improvment time controls


5 | 5 is considered blitz, while 10 | 0 is considered rapid
Rapid games in theory tend to last longer, which means in this case you'd usually have more time to think in the middle game.
If you're playing 5|5 and your game has more than 60 moves, then your 5 | 5 will last longer than a 10 min game with no increment.
However, you won't have increments in 10 min, whereas 5|5 you'll have increment and less likely to get flagged.
It's a personal a choice... you can customize a challenge to play 10|3, but I don't know how easy it will be to find opponents

5+5 is a good time control imo because you have the increment which allows you to think. 10+5 is another nice time control and I think it's more common on lee chess

I believe around 10min games are optimal for having enough time to think for a little bit, while being short enough to fit in a busy schedule.