Facebook Cover Photo Do's and Don'ts [+Cover Photo Templates]
Hubspot
APRIL 1, 2018
Covers can't be deceptive, misleading, or infringe on anyone else's copyright. Back in 2013 , Facebook removed any reference to the 20% rule on text in cover photos. The thumbnail you choose will display for users who hover their cursor over your profile photo before visiting your full Business Page.
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