The Brief: The "this user has hidden tweets from" meme format calls out certain groups and individuals on Twitter.

DEEP DIVE
At first glance, it might look like a new Twitter feature, but “this user has hidden tweets from” tweets are actually just a new meme. By posting “This user has hidden tweets from ____. Learn More,” people are joking that they’re hiding their tweets from certain groups or individuals.
https://twitter.com/izzyeditss/status/1275843148678340608
Sometimes, these memes suggest that someone must not be a member of the group that the tweets are “hidden” from to see the tweet. In other cases, the idea is that members of that group see the tweet as a notification that they can’t see more tweets from the user who posted it. Either way, it’s all made-up as Twitter doesn’t actually have a feature allowing users to hide tweets from some people other than by making their account private.
The “learn more” is underlined, making it look semi-official, but this effect can be achieved by copy/pasting the underlined phrase from another tweet or by using an outside text editor.
“This user has hidden tweets from” memes are often used in good fun, to make fun of groups of people, but they can also have a harsher effect when they call people out in a targeted manner that feels more like bullying.
This user has hidden tweets from straight bitches. If you see this you’re a big gay. L͟e͟a͟r͟n͟ ͟m͟o͟r͟e͟
— ellie (@chaesblunt) June 24, 2020
This user has hidden their tweets from non vegans. L͟e͟a͟r͟n͟ ͟m͟o͟r͟e͟
— David Ⓥ #BLM (@VeganGenesis) December 30, 2019
This user has hidden this tweet from people who don't want to see any more 'user has hidden tweet' tweets. L͟e͟a͟r͟n͟ ͟m͟o͟r͟e͟.
— lizzie (Void) (@dykecomplex) June 24, 2020
This user has hidden their tweets from you specifically damn. L͟e͟a͟r͟n͟ ͟m͟o͟r͟e͟.
— 7y (@yyyyyyyed) June 24, 2020
This user has hidden their tweets from bad bitches who deserve the world. L͟e͟a͟r͟n͟ ͟m͟o͟r͟e͟.
— Marxoxo ༺୨♥୧༻ (@bbymarxoxo) June 24, 2020
This user has hidden their tweets from people that have put the evil eye on them. L͟e͟a͟r͟n͟ ͟m͟o͟r͟e͟.
— as (madou HATE account) (@hanzocuIt) June 23, 2020
This user has hidden their tweets from cuties who should send them feet pics. L͟e͟a͟r͟n͟ ͟m͟o͟r͟e͟.
— gooey (@gooeysocks) June 24, 2020
This user has hidden their tweets from men who stay in women’s business. L͟e͟a͟r͟n͟ ͟m͟o͟r͟e͟.
— ♀ (@gaultierdoll) June 24, 2020
This user has hidden her soul in a box of cereal. L͟e͟a͟r͟n͟ ͟m͟o͟r͟e͟.
— so sad today (@sosadtoday) June 24, 2020