I've been gone for about a month due to my computer being in the shop, so I've missed a lot. I've noticed on certain parts of the site there is an option that says 'Leave an Alert', like when you get something from the pumpkin patch. What does it do??

In these cases, there is a certain amount of time that has to pass before doing the activity again. 'Leave an Alert' will notify you (just like if you received an item) when you're able to go back for the activity.

Ah okay. That is actually very helpful XD