YouTube videos that could help you do this task :

How To Verify Your Domain On Facebook Business Manager :

https://www.youtube.com/watch?v=CceBUxUoWzg&ab_channel=VertexMarketingAgency

Goal: Verifying your domain in Facebook Business Manager.

Ideal Outcome: Facebook is able to correctly verify ownership of your site.

Prerequisites or requirements: You should have created a Business Manager account for your site you can follow:

Create a Facebook Ads account using Business Manager

Plus, you’ll need to have access to your domain registrar (e.g. GoDaddy, Google Domains, Dreamhost, Siteground, Cloudflare, etc)

Why this is important: Several reasons, the main one is related to the Facebook updates related to the release of iOS 14. Facebook Ads will now only allow you to track up to 8 conversion events to be configured per domain — before you configure those events, you’ll need to verify your domain.

Where this is done: In Facebook Business Manager, and in your domain registrar.

When this is done: Before you run any Facebook Ad campaigns.

Who does this: The person responsible for Facebook Ads.

Add your domain to Business Manager

1. Go to your Facebook Business Manager dashboard and click on the account you want to work on.

2. Click on the hamburger menu, and then click on “Business Settings”

3. Under “Brand Safety”, click “Domains”

4. If this is your first time verifying a domain for this Business Manager account, you’ll need to add the domain.

1. Write your domain URL and click “Add Domain”