Column · write product page
Because it proves you have used the thing. A page with no caveats reads as untested, and buyers discount untested claims heavily.
Testimonials from people nobody can check, counters of users you cannot name, and any sentence beginning "we are passionate". None of them help a stranger decide.
Time from landing to understanding what is sold. If it is longer than a few seconds, the page is losing people who would have bought.
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