Analytics
There are many tools, online, for the analysis of one's Twitter account.
One of the most comprehesive is from Twitter, itself. Visit https://analytics.twitter.com to check it out.
Once you are logged in, with an account that you own, you will see a "Get Started" button. Press it and you are instantly off.
It will display a huge amount of statistical data about your account, including a lot of detail e..g what was your most popular tweet, this month and who followed you the most, etc.
You will have to find out, for yourself, what is there, by looking around.
Some of these analytics are designed for the benefit of those using Twitter as an advertising vehicle but most of it is very useful to any serious tweeter.