Everyone knows that Instagram is THE platform for the use of the hashtag, but what is the ideal number to use?

Instagram currently allows up to 30 hashtags in your original caption, but current evidence suggests that the optimum number to use is 11.  By this point engagement levels have peaked and then fall away.

Oh, and use your most important hashtags first! Your followers are unlikely to read them all, so make sure they do read what you really want to say!