The quickest way to create an audience on Movement using external data is the Create a list option in the audience tab:
Step 1: Prepare your data
Pull your list of members from your external data source - you can use membership numbers, email address or phone numbers to match this group against members in Movement. You can copy and paste this data in step 2 or upload it as a CSV.
If using a CSV you only need a single column headed Membership number, Email, or Phone number containing the data for everyone you want in your Movement audience.
Confirm what data point you are using and hit next: upload data
Step 2: Upload your CSV or paste in your data
Step 3: Review your data and name your list
If there are any issues an error message will provide more information.
Step 4: Upload
You will received an email when the upload has been processed and the list is ready to use.
Step 5: Turn your list into an audience
Create an audience using the list by selecting the filter 'Within list(s)'