Where can I obtain data on Hashtag USE. By "USE," I'm referring to actual interaction with the hashtag to FIND the content related thereto. I'm inundated with lists of the top hashtags USED (none of which show any similarity to one another), but what I really want is to know what hashtags are SUCCESSFUL in order to decide whether they are going to get the attention I desire.
Not sure I understand the question. I usually go and look at hashtags that are trending (like it seems you have), then I go into Hootsuite and create a stream that only searches the hashtag I am targeting so I can see the conversations involved with it.
Not sure if there is a free service but .. Have you checked out https://www.hashtags.org/ or http://top-hashtags.com/instagram/ or http://hashtagify.me/popular Great tip.