The Business Manager, also known as BM, allows companies to share and control partner access to their Facebook ad accounts, pages, catalogs and other assets.
If you are a Facebook advertiser who shares access to multiple accounts and pages with others, we recommend making the switch to the Business Manager.
The Facebook Pixel is a conversion code linked to the pages of the website to which the traffic will be directed.
You can give people access to your ad account from your business settings in Business Manager:
You will be charged according to the configuration of the campaigns and your charging limit in the tool.
Facebook does not currently have a phone to support the advertiser.