Instagram is a social networking platform where users can share photos privately or publicly. To reach a wider audience on Instagram, users need to gain more followers. The document provides several techniques for gaining Instagram followers fast, including making accounts public, using relevant hashtags, regularly uploading new content, using filters, posting picture collages, timing uploads during peak hours, following and engaging with other users, syncing accounts with Facebook, including calls to action in captions, and participating in photo-sharing groups. Regularly posting engaging content and interacting with other Instagram users are emphasized as effective strategies for increasing followers.