Hey there,
The polling.php and the polls are totally different thing.
What this polls is something like voting system in EasySocial as shown in the first screenshot.
What this polling.php does is it will always send a request to the server and receive the latest data from the server. It is mainly for the friend request, conversation, and notification. For example, if your friend posts a new comment on your post, the notification icon will show a counter with it without refreshing the page.