The example below illustrates a task that will target the last 500 posts using the hashtag follow4follow. Because the “Follow” promotion type was selected, your Instagram will follow the authors of the last 500 posts. Note, that because one person might be the author of multiple posts using the same hashtag, sometimes you could follow less than 500 people.
Usage: by targeting the follow4follow hashtag, you can quickly get a high number of people following you back. This is an excellent way to quickly increase followers but should only be used if you don’t care about targeting or segmenting your followers.