+1 may refer to any of the following:
+1 is Internet shorthand for agreeing with someone in chat or on a forum, or bumping a post that is good.
The +1 is an indication of an increase in points, life (hit point), or another metric in a game or other points system. For example, in a game, you may get +1 life for every second you are sitting down.
A Google button that let others know you recommend a web page. This button was discontinued when Google+ was discontinued.
Internet terms