How to Link Your Instagram to Your Facebook Page
Making use of Facebook's Web page user interface
1. On Facebook, browse to the business' Facebook web page.
2. Click Settings.
3. Click Instagram in the sidebar.
4. Click Visit.
5. Enter your Instagram credentials. Click Visit.
Making use of Facebook's Manager
1. On Facebook's Business Manager, click Service Setups.
2. Click Instagram in the sidebar.
3. Click Add.
4. Get in the business' Instagram credentials. Click Next.
Optional: Connect any kind of relevant Advertisement accounts. If you do not want to add one, click Avoid.
5. Click Done.