Twitter provides some useful reporting analytics for how many people have engaged with your tweets, visited your profile, followed you, favorited your tweets, etc.
Once logged in, click on the portrait at the top of your page and select 'Analytics' from the drop-down menu as shown in the picture below:
On this next page, you will see a summary of your profile's interactions with other users. The page will look something like this:
To individually identify which of your Tweets have gotten the most user engagements/views click on the 'Tweets' tab at the top of your page:
You will be brought to a page where you can breakdown each individual Tweet's analytics. Try checking out the Tweets, Top Tweets, Tweets and replies, and Promoted tabs.
If you'd like to learn more information about Twitter analytics, please visit their help documentation here: Twitter Analytics