The option to receive an alert on something you are interested in when certain conditions are met.

Alert methods: Email (if emails from itch.io are enabled) & notification area.

Conditions:

Added to a bundle.

Price drops below a value.

A new update is released.

> Maybe others but those look like the most obvious uses.

Operation example:

Game ABCDE

Price $12.34

Version: 1.23

User taps on / clicks on [Set alert] button on the games page

They then have multiple options:

[check box] Alert me if added to a bundle.

[check box] Alert me if updated.

[check box] Alert me if price drops below [Value box].

[Save] [Remove] [Cancel]

Save sets the alert to go off when the conditions are met.

Remove removes any set alert for that game

Cancel cancels the operation.

Value box expects a numeral value like $2.50.

Check box is an on/off toggle like choosing a tag on these forums.