Deleting Local Content on Steam

if the save data is in the game folder then yes, but if steam cloud don't think it will

if the game uses steam cloud you are totally safe. If not then save data might get deleted. I think that there is a program that can backup save files,not sure. Ofc you can also do that manually

save-data would be intact only for games that use steam cloud .

It varies from game to game. A lot of games store their save data outside of the Steam folder, in which case they are completely safe. Hell, even some games that do save it to the Steam folder don't delete the folder outright, so you're safe in that case as well! However.. some games do save to the steam folder and do delete the steam folder outright so.. there really is no hard and fast answer to this question.

Just click Backup game files before that and you are OK

Wanna be safe? Grab this, basically will back up all your saves in case some on steam don't have cloud saves.

You delete game data, save games, settings data, browser cookies and you secret porn folder. That's how this function is designed.

Deleting Local content means you delete ONLY the game, on some games it ask you if you want to delete and the save data too.

Most of the time, the save data is saved to your My Documents. At least, that is where all my games save to.