Nice, but how does it work? Does it base recommendations off games others have played, games your friends have played, similar genres to game’s you’ve played, or similar developers?
Does it use personal information like where you live, your age, what language you speak, etc?
Does it use AI? It would be nice if it were more transparent. 
We know that it will be personalized, but based on what?
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Woot Woot!
Woah!!! This will be awesome for discovery! Thanks for adding this! I do have some questions, though, as this post did not explain a lot.
First of, I’d like to say that it’s really nice that players on Roblox can find games that they’ll like rather than what everyone else likes. I’ve had to play the same games over and over again because I haven’t been able to find any games good enough. That may change with this update.
It’s been long awaited. 
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Additionally, If you’re taking personal data, is that really allowed? COPPA restricts your ability to do so. Youtube used to collect PI of children and got in trouble.
How does the algorithm work?
There should be a statistic that tells you if your game has been recommended, and how many times it has been. That could be useful to developers.
Other things to add could even include:
- Something to keep track of games, rather than just “favorites,” like an organizational system.
- A way to tell the algorithm you don’t like what you just saw. That could be useful. It could take in account likes and dislikes.
- More ways to rate a game other than “I like” and “I dislike.” It could be based on gameplay, graphics, compatibility, etc.
- Make sure a game doesn’t appear twice.
- Specific sorts for recommended. Things like horror, obby, FPS, etc. That would be epic.
This way the recommended tab would be even more personalized.
Is this also related to the new recommended sort of the catalog in any way?
On another note,
At the moment, many are also complaining that they’re being recommended games they’ll never plan on playing.
How will you make sure there’s quality games in the selection? There’s been recommendations for others that have turned out to be low-quality games. For me, I’ve gotten recommendations that may fit my fancy, but many still do not.
Let’s look at mine:
Nice start, I don’t see any games that would be on the “popular” selection.
Bloxxer Island: Interesting. Not to sure what it is, though. 
Witching Hour: God I love plates of fate, good recommendation. 
Don’t Touch: I love Sharkbyte studios. This one looks fun, I’ll check it out!
Notoriety: FPS is alright for me, but probably not going to check out.
[DEVIOUS] Survive the Killer!: I don’t like horror games.
Roblox’s Got Talent: If this is similar to the dancing game, and is an opinionated game, then no.
EM’s Difficult Chart Obby: I don’t like obbies.
THE DIFFICULTY CHART OBBY: I don’t like obbies.
Airport Tycoon: I don’t like tycoons.
Possessed 1.1.1 ALPHA: I don’t like horror games.
Ace Attorney: Roelplay… but I haven’t played the game so probably not.
Horrific Housing: PLATES OF FATE! Of course I’ll check out.
Gertude and Pukan [JAIBREAK]: I don’t like horror games.
Obby Island: I don’t like obbies.
Club DJ: No gameplay tho 
Mega Easy Obby 500 Stages!: No.
Ok, the reason why I got recommended so many horror games and obbies is because I do play them, even though I don’t like them. So you could say this is more accurate than it is.
Looks to be sort of accurate. Everyone else’s recommendations are different, and I’m not sure if theirs fir their taste, but some have, for me.
Even through all the criticism, though, I think it’s still a excellent update.
Great change regardless. 
I’ve edited this post to be easier to read.
!