Depends on the sort of link.

If it’s an image and doesn’t produce a thumbnail for some reason, kind of bummed 'cause I seem to run into those often on mobile & don’t like the feel of bouncing between apps/tabs on mobile as much. Similar situation with videos tbh, except add in that I don’t like listening to videos on my phone without headphones & I typically don’t have headphones on me since I’m not using my phone for that sorta thing often.

If it’s an article and the title’s simply the headline of it, I don’t mind too much. A summary or some quoted parts of the main point of the article are appreciated, especially if it’s from a paywalled site.

If it’s from an unfamiliar site with few indicators of what’s up with the link then I really would like the OP to indicate wtf they’re posting a link to in the title & body text 'cause otherwise I’m inclined to think it’s spam or worse, and generally that tends to be the case.