I truly believe that it's more about the content of the captions and bio and nothing about keywords. I have seen so many accounts talk about optimizing their keywords and bio, but mine hasn't changed a bit. I've experimented with a couple of the ig tools in order to come up with the right keywords, but have yet to see any of these bring fruition in terms of discovery. One of my friends used boostbysocial and claimed that his engagement rate had increased significantly, but did they do this through content strategy or is it the growth support? If you're not sure what actions are actually making a difference in your business.