is a free e-book repository, a post about "Zoboko Search Verified" likely refers to ensuring e-books found via their search are authentic and safe.
"You have to pay for Verified Search." Fact: The filter is free. However, priority access to the Verified queue (skipping the waiting line for new uploads) is a premium feature. You can still get verified results; you just might wait 24 hours for new books to be processed. zoboko search verified