Sites where “21st dev” is a top search keyword

One site on record lists “21st dev” among the searches that send it the most visitors, by traffic estimates. It is searched about 201.1K times a month, at about $1.74 a click in search ads: a month of its searches would cost about $349.9K as search ads. Each site checked on the backlink value checker adds its top five search keywords, so this list grows as sites are checked.

Listed A–Z. A top search keyword is one of the searches that bring a site the most visitors, by estimate. It is not a position in Google, and the order here is not a ranking. Visits (est.): the traffic estimate's own figure for the keyword on that site, which behaves like visits a month, not an amount of money (2026-09-29: it had been shown in dollars). Ad value is what advertisers pay for the keyword — its searches × cost per click — not how hard it is to rank for. This page is kept out of search results until 15 sites share the keyword.

Keyword data from third-party traffic estimates, Sept 2026.