Google is testing a large "Visit site" button on the sponsored results, the Google Ads, within the Google Search results. Google has done this before for organic sitelinks and map results, and even Bing did it for some branded-style search results.
Arpan Banerjee spotted this test and posted a screenshot of it on LinkedIn - here is that screenshot:
I am not sure I like this but I do suspect it would increase the click-through rates. But I do like all the arrows on this screenshot, I like arrows. :)
Forum discussion at LinkedIn.
Update: October 2026 Sachin posted a white version of this visit site button:
