Step 1:
Go to TikTok, then go to Audience, and then click on "Create Custom Audience"
Step 2:
Give Audience Name
Select Ad account
Select Audience Type:
Pixel: Pixel is whoever reached through a particular pixel
Select Audience Sub Type:
Reach & Frequency: Reach & Frequency (R&F) is a campaign buying type on TikTok Ads Manager that lets you control the audiences you reach and the number of times they are exposed to your ad messaging before delivery.
Normal: Is the default subtype
IS AUTO REFRESH:
TikTok Ads Manager allows advertisers to auto-refresh their Custom Audiences. When you first create an audience, you have the option to enable Auto-refresh using the auto-refresh toggle. The audience will auto-refresh daily to include the latest user data, according to the lookback windows you specified during the audience creation. If you disable Auto-refresh, the audience will not auto-refresh. With up-to-date data, advertisers can understand their audiences better and reach more target users.
Auto-refresh-enabled Audiences created with lookback windows will observe dynamic auto-refresh based on the time period selected.
For example, if you create an engagement audience on Mar 8th with a lookback window of 7 days and auto-refresh enabled, your audience on Mar 8th will include users with specified engagement from Mar 1st to Mar 7th. On Mar 9th, with the auto-refresh, your audience will now include users with specified engagement with the dynamic lookback window of 7 days (from Mar 2nd to Mar 8th). However, if you created the same audience with auto-refresh disabled, your audience will be static and will not change over time.
Select Include "Any"
Build Audience Rule 1 for Include condition:
Select Pixel and Event
Select Lookback Periods: Select the number of days the data will stay in the audience. You need to select at least one retention time.
Select Exclude "any"
Provide Audience Rule 1 for Exclude condition:
Select Pixel and Event
Select Lookback Periods: Select the number of days the data will stay in the audience. You need to select at least one retention time.
Click on "Create Custom Audience"
Facebook and Snapchat platforms also have custom audience builders, must check this feature.