In short, Minnesota wants to prevent large social-media companies from individually targeting under-18's with prioritized user-generated content?
The title makes it sound more general, e.g. like under-18's couldn't use social-media at all. But instead, it sounds like they don't want under-18's having user-generated content individually targeted at them, or something like that.
I'd guess that the concern would be echo-chamber effects? This is, if users get targeted with content algorithmically selected just for them, then it may tend to silo users' perceptions. And that might be especially concerning for less-experienced users, who may not realize it's happening or see stuff outside of that bubble.
The title makes it sound more general, e.g. like under-18's couldn't use social-media at all. But instead, it sounds like they don't want under-18's having user-generated content individually targeted at them, or something like that.
I'd guess that the concern would be echo-chamber effects? This is, if users get targeted with content algorithmically selected just for them, then it may tend to silo users' perceptions. And that might be especially concerning for less-experienced users, who may not realize it's happening or see stuff outside of that bubble.