the.com/fine print

means The small, dense text in a contract or ad that spells out the limits, exceptions, and obligations the big bold headline conveniently skips.

from Literal before it was figurative: in print shops, 'fine print' meant typeset in a small font size to cram more text into less space — originally just a practical printing term. Advertisers and contract-drafters realized that shrinking the type was a handy way to shrink the reader's attention too, and by the 20th century 'the fine print' had become shorthand for the clauses nobody reads but everybody is bound by.