Explanation
Whenever you run into audiences that have a high overlap, you should always merge both of them into one. If you run both audiences under the same campaign, you will have multiple ad sets competing against each other.
If you have never used Facebook's audience overlap tool, you can find it on Facebook's Ads Manager and follow the next steps:
* Click on the Tools drop-down menu and choose Audience.

* Once there, select the audiences you want to compare, click on the Actions tab, and choose Show Audience Overlap.
* You can select multiple audiences, but you will only be able to compare one against the other at a time.In the tool, you will be able to see the number and percentage of overlapping members between them.
A second option is to completely change one of the audiences so that there is less than 25% overlap between both audiences.
In this case, you could change audience #1 interests to something different but still related to your target market to have two potential audiences to use.

Explanation
Whenever you are doing brand awareness campaigns, you want to make sure you focus on metrics that allow you to maximize your budget for the target audience.
In this case, you want to measure CPM, frequency, impressions, and brand lift.
You don't want to use direct response metrics such as CPC as you are trying to maximize reach and frequency for your brand awareness campaigns.

Explanation
Custom Audiences were designed to maximize information security and privacy. Facebook systems have been audited by an independent third party, PricewaterhouseCoopers. They confirmed that Facebook's secure mechanisms protect advertisers' information throughout the creation, use, and storage of their Custom Audiences.
Hashing is a process that turns information you share with us into short fingerprints that are impossible to reverse .
Here's how it works:

* When you begin the process to share your customer list, it's hashed locally in your browser before it's uploaded to Facebook.
* We match the fingerprints of your hashed list against ours.
* The matches are added to a Custom Audience for you.
* The matched and unmatched hashes are deleted.

Explanation
A landing page view:
* Has a fixed short attribution window and is only attributable to a link click (unlike a custom conversion which could be attributed to a click or a view)
* Can occur only 1 time per link click (unlike a custom conversion which can occur multiple times per link click / view)
* Uses the PageView event, so it's available as part of the Facebook pixel base code (unlike a custom conversion, which requires you to set up a ViewContent custom event)

Users will ONLY be owners of digital assets (Fan Pages, Ad Accounts, Instagram Accounts, Pixels, and so on) if you make them administrators at the Business Manager level.
Based on Facebook best practices, you should always add team members as employees and not administrators of your Business Manager, this way you can still have control of the permissions and assets of your Business.
The Business Manager Account has two level of users:
Administrators
Employee
Users at the employee level will not own accounts, even if they are administrators of the Fan Page, Ad Account or any other digital assets.