Do you game on Ubuntu or one of their flavours like Kubuntu or Xubuntu? Canonical want your help in further testing of the Steam snap. For anyone confused: there's many different types of packages on Linux. There's deb, rpm, flatpak, snap, appimage and more. Snap is what Canonical (who make Ubuntu) are rolling with.
Writing on their official Discourse forum, developer Ken VanDine mentioned they're hoping to have the snap of Steam out of Early Access soon and available to everyone.
In the post VanDine mentioned they've been "working feverishly to resolve issues and ensure it works well" and testing has been done across "the most popular Steam titles which should ‘just work’ based on reports on ProtonDB". But now they want more people to get involved to give their reports on how games work.
Details on how to get involved can be seen in the forum post.
The overall feeling you get from looking online is that snaps aren't particularly popular. However, is it just a case of a few people shouting above the rest? VanDine answered a few of my questions on that and more in an interview with GOL last year.