How to Link Instagram to Facebook Business Page
Using Facebook's Web page user interface
1. On Facebook, navigate to business' Facebook web page.
2. Click Settings.
3. Click Instagram in the sidebar.
4. Click Visit.
5. Enter your Instagram credentials. Click Log In.
Utilizing Facebook's Business Manager
1. On Facebook's Manager, click Company Settings.
2. Click Instagram in the sidebar.
3. Click Include.
4. Get in business' Instagram credentials. Click Next.
Optional: Link any appropriate Ad accounts. If you do not wish to add one, click Skip.
5. Click Done.