1. Create Free Business profile
Creating and publishing ads are easily done on a business account, for this you don't need any advertisement tool. This has insights where you can get information about your target audience,Stats about a number of impressions, reach on days. This is perks of using a business account.
2. Free tools in Instagram
Insights provide demographics of your followers, including information about age, gender, and locations. It helps you to know your audience response on the post.Optimizing post to boost your audience can be done with the help of these stats.