First enable followers for your profile, goto and do as shown below

Even if you have enabled followers in your settings, you may not see followers on your timeline or profile. This is how it should look(Click on image to enlarge it).

If you cant see that, you have to edit some settings. Please see images below to understand

2017-06-02_065313 2017-06-02_065737 2017-06-02_071241