When you post something it’s shown to your followers on the home page.

And on the explore page.

If you are not reaching non-followers you won’t grow

  1. Post most active time your followers 
  2. Ask something you want to know
  3. Reply to all comments
  4. Reply in some categories or inline with your profile
  5. Use emoji
  6. Use easy to read language
  7. Use mostly low and medium traffic hashtag

Referens : David Talas