X is testing a new advertising format designed to blend more seamlessly into user conversations. The experimental feature places a small contextual ad unit directly beneath individual posts, offering calls to action tied to the topic of the tweet. If a user mentions a football game, for example, the appended ad might promote game tickets or team merchandise. The test reflects a broader industry push toward advertising that feels less intrusive and more relevant to what users are already discussing online.
Using a local example, tweets about the weather could be appended by text that promotes weather-fitting weekend activities nearby, or retail promotions for sunglasses, sunscreen, and bathing suits. These ad units, at least in their current form, are text-only and subtle enough to not steal the show.
X appears to be experimenting with this idea so far using house ads. As you can see in the example below, a post that mentions Starlink is served an ad that says “Get Starlink.” Ads appear to be contextual in nature but could involve other targeting triggers, such as behavioral (past activity) and geographic.
Familiar Line
When asked about the new feature after it was spotted, X head of product Nikita Bier confirmed the experiment, saying “Trying to make an ad product that isn’t an ad.” That’s of course the holy grail of advertising and isn’t new, as it’s a founding principle of Google’s ad business, among others.
The “ad that’s not an ad,” line is also a familiar one lately. OpenAI’s much-discussed forays into ad support have been couched with assurances that ads will be contextual but incidental. In other words, they won’t influence the core integrity of the chatbot, but recommend businesses when related.
All of this makes sense for X, given the volume of discussion happening across the twittersphere, or X-sphere, or whatever we’re calling it. X’s existing ad business carries these principles with in-feed ads that are contextually targeted. This new format atomizes and integrates things more granularly per post.
Trying to make an ad product that isn’t an ad
— Nikita Bier (@nikitabier) March 6, 2026
Weren’t They Already Doing This?
Altogether, X is intent on boosting monetization. This latest discovery comes just a week after it announced “Paid Partnership” labels. These formalize creators’ sponsored posts, which they previously used hashtags for – a move to professionalize things and attract more creators to the platform.
Meanwhile, this week’s move is so logical that it’s one of those classic “weren’t they already doing this?” moments. That was our initial reaction, and others will likely feel the same. Going forward, we’ll be looking out for live examples – especially location-based contextual ads that are, again, fitting.
Of course, this all could end up being nothing. Apps and web products constantly test things in the wild, prompting eagle-eyed users and developers to spot features in development. Some of them end up becoming fully-deployed products, while others go nowhere. We’ll see which path X takes here.
Header image credit: Alexander Shatov on Unsplash
