1. The first step is to log into your Facebook Business Manager, then click:
Settings > Business Settings
Data Sources > Pixels
2. Choose Assign Partner on the right-hand side.
3. Enter Gravity's Business Manager ID (#2349797041933333) and choose Confirm.
And that’s it! You’re all set.
Additional Info on the Facebook Pixel & Facebook Analytics
According to Facebook, if you’re already using the Facebook Pixel, you’ll instantly start seeing web activity data in Facebook Analytics without making any changes.
You’ll also be able to use all of the features of Facebook Analytics, such as creating funnels to measure conversion, viewing cohorts to measure changes over time, and using demographics and segments to better understand particular audiences.
For example, segments allow you to see the demographics of your top 10% of users or compare how one demographic group converts in your funnel at a different rate than others.
This will ensure that you’re getting accurate user counts and session length time. If the page view event isn’t being triggered on all pages of your website, then your active user numbers and session times will only measure activity on the pages where the page view event is being triggered.