When Someone Shares Your Link, They're Sharing a Poster You Never Designed
The camp page that showed up as "Home"
Illustrative scenario, not a client story; results vary.
The link goes to the new kids' climbing camp page, but the card that shows up under it is a cropped slice of the homepage banner and one word: "Home." Picture the owner of a small climbing gym looking at that on LinkedIn, right after hitting share.
The camp page itself is good: dates, age groups, a photo of the youth wall, a clear sign-up button. But what people saw in their feed was a strip of chalky hands with the top cut off and a title that could belong to any website on earth.
Nobody did anything wrong. The owner built the page the usual way: write, add photos, publish. What nobody mentioned is that a shared link turns into a second, much smaller version of the page, and that version has its own picture and its own words.
That's the belief this post takes apart: "When my link is shared, whatever picture shows up is just how it works. I can't control it."
The page was built. The poster for it wasn't.
Every shared link is a small poster
Here's the reversal. Every shared link is a small poster, and if you don't design it, something else gets picked.
When you paste a link into a social post or a group chat, the app often doesn't show the bare web address. It builds a little card: an image, a title, sometimes a line of description. That card is often the first piece of your website people see, before they've seen a single thing you put on the page.
So the card isn't decoration that happens to you. It's a design surface, and it's set page by page. If you leave it empty, the network or your site builder fills it in with whatever it can find: a banner cropped to the wrong shape, a logo floating in white space, or a page title that only made sense inside your site's menu.
The good news: the parts are few.
Where the card comes from
The card isn't chosen at random. It's built from a handful of tags tucked into each page's code, using a standard called Open Graph. You never see them on the page, but apps read them when a link is shared.
Four of them do most of the work:
- og:title, the headline on the card.
- og:image, the picture. The Open Graph spec describes it as "An image URL which should represent your object within the graph."
- og:description, the short line under the title.
- og:url, the address the card points to.
LinkedIn's own help page on making a website shareable lists these as the tags that "must exist and their correct format".
If you build on Wix, you're not starting from a blank slate. Wix says: "By default, the values you use in your SEO title tags and meta descriptions are used in your Social Share og:title and og:description." That's why the climbing gym's card said "Home": the camp page was borrowing words from somewhere they'd never been written for sharing. If that word looks familiar, we covered why a page title that says "Home" matters in search, too.
Size and shape: make an image for the card
A homepage banner is often long and thin, made to stretch across a desktop screen. A share card is a different shape. Ask a banner to be a card and the app crops it, wherever it likes.
Wix's help page on social share images spells out the shape it recommends. It says the recommendations are taken from Facebook's sharing best practices but are relevant for all share images:
- "Og:images should have an aspect ratio of 1.91:1."
- "Image size should be 1200 X 630 pixels (px)."
- "Your image shouldn't be larger than 8MB."
The same page notes that an image smaller than 600 × 315 pixels shows up as a small image in the link preview instead of a big one, and that on WhatsApp the image preview only shows if the image is under 300 KB.
The design point underneath the numbers is simple. An image made for the card beats a crop of something made for something else. Start with a wide canvas at the recommended size, put the one idea of the page in it (the camp, the product, the event), and keep your words and logo well away from the edges, because different apps trim the card a little differently. It's the same reason we plan one video in three frames: the crop is part of the design, whether you plan it or not.
One image for the whole site vs. one per page
There are two levels to set, and they do different jobs.
The first is a site-wide default. Wix has a "General social image" option in the site's settings, so you can upload one image that's used for the whole site wherever nothing more specific has been set. This is your floor. It stops links from showing up blank or with a random picture pulled from the page.
The second is a share image for the pages that get shared on their own. Wix says you can set a different share image for each page of your site, or one image for the whole site.
Illustrative scenario, not a client story; results vary.
Picture a small leather goods shop that set one beautiful storefront photo as its site-wide image and stopped there. Every product link now shows the same storefront. A customer sends a friend the link to a wallet; another sends the link to a belt. In the group chat, the two cards look identical. Nobody can tell which is which without tapping.
The storefront photo did its job: nothing shows up blank. But one site-wide image is a floor, not a plan. The pages people actually share, like the best-selling products, the booking page or this month's event, need their own poster so each link says what it is before anyone taps.
You don't need one for every page. You need one for the handful of pages that travel.
Write the card's words for a scroller
The card's words get read in a feed or a chat, between other messages. They get a glance, not a read.
That changes what a good title looks like. "Home" tells a scroller nothing. "Services" isn't much better. A card title should say what the page is and who it's for, in plain words, the way you'd say it out loud: "Kids' climbing camp, summer weeks," not the name of the menu tab.
Wix gives two length limits worth writing to. It recommends keeping og:title "below 80 characters" and og:description "below 300 characters" or some of the words may be cut off. Put the useful part first, so even a trimmed card makes sense.
Since Wix fills these in from your SEO title and meta description by default, either write those to work in both places or set separate share words for the pages you share most. Either way, someone should actually write them.
Describe the share image, too
The picture on the card should be described, just like the pictures on the page. The Open Graph spec has a tag for this, og:image:alt, and says it should be "A description of what is in the image (not a caption). If the page specifies an og:image it should specify og:image:alt."
Whether and where your site builder lets you set it varies, so check your own settings. The habit is the same one we wrote about for banner words on the page: if something important lives in an image, make sure it's also said in words.
Test before you post: networks decide, and they remember
Here's the honest part. Even when every setting is filled in, the network makes the final call. Wix says it plainly: "While it's likely the information in your Social Share settings will be used, it's not guaranteed."
Networks also remember. An app can hold on to what it pulled from your page earlier, so changing the image on your site doesn't always change the card the next time you share.
Illustrative scenario, not a client story; results vary.
Picture a tile showroom owner who finally replaces the blurry share image on the showroom's main page with a clean, wide photo of the new display wall. They share the link again, and the old blurry picture still shows up. It looks like the change didn't work. It did; the network just hadn't looked again yet.
That's what the inspector tools are for. Wix's help page names several: the Facebook debugger, the Twitter (now X) card validator, the Pinterest Debugger and LinkedIn Post Inspector. You paste your link in and see what that network sees. After a recent image change, Wix recommends running your site address through the Facebook debugger so the information is up to date.
Sometimes the tool shows no image at all. LinkedIn's help page names one reason: "your website may be blocking us from pulling the image or the image may be located on a protected directory or website." That's a sign to look at where the image is stored, not to give up on the card.
So testing isn't a step for perfectionists. It's part of sharing a link: check the card in the network you're about to post on, then post.
A link preview checklist
You don't need to learn the code. You need to look at your links the way your customers see them, then decide what each one should show.
- List the 5 links you share most.
- Look at how each one shows up as a shared card (paste it into a draft post or a chat to yourself, don't send).
- Set a general social image for the whole site so nothing shows up blank.
- Design a share image for each of your top pages: wide (1.91:1), words and logo away from the edges.
- Write each card's title and description for a scroller, inside Wix's recommended lengths.
- After any change, re-check the link in the network's inspector tool, then share.
This is usually where a self-check stalls: step 2. You can see that the card is wrong, but not why.
If step 2 showed you "Home" or a picture you didn't pick, and you can't tell whether it's coming from the page, your site's default image or the network's memory, book a free 30-minute Link Preview Check. Bring the 3 to 5 links you share most; nothing to prepare. We'll look at how each one shows up as a shared card, point out what's being picked for you, and show you where the share image and words are set.
What this isn't
This isn't a promise of more clicks, and it isn't a guarantee that any network will show the card you design. The networks set their own rules, change them, and make the final choice. What you control is what your pages offer them: a picture made for the card, words written for a scroller, and a habit of checking before you post.
That's the whole shift. Your links are already being turned into posters. The only question is whether someone designed them.
A note on the examples: The climbing gym, leather goods shop and tile showroom in this post are illustrative composites, not clients, and results vary. Wix wording is quoted from the Wix Help Center (Customizing the Social Share Settings for Your Site's Pages, Recommended Social Share Image Size and Changing Your Social Share Image); Open Graph wording from The Open Graph protocol; and LinkedIn wording from Make your website shareable on LinkedIn, as of the fetch date. Their wording may change, and nothing here suggests any of them endorses this advice.
Every time someone shares your link, a friend sees a little poster for your business before they ever visit your site. Make sure it doesn't just say "Home." Bring the 3 to 5 links you share most to a free 30-minute Link Preview Check. You'll leave knowing what each one shows when it's shared, what's being picked for you, and where to change it. Fix it yourself, or have Marketing Munster design the share images and set up your pages.