ahrefs Glossary

Keyword Difficulty (KD)

Keyword Difficulty gives an estimate of how hard it is to rank in the top 10 organic search results for a keyword on a 100-point scale. Learn more.


An estimation of the average monthly number of searches for a keyword. Learn more.

Global Search Volume (GV)

Global search volume shows how many times per month, on average, people search for the target keyword across all countries in our database.

Traffic Potential (TP)

Traffic potential shows the sum of organic traffic that the #1 ranking page for your target keyword receives from all the keywords that it ranks for. Values are cached and might differ slightly between reports.

Cost Per Click (CPC)

Cost Per Click shows the average price that advertisers pay for each ad click in paid search results for a given keyword. Learn more.

Clicks Per Search (CPS)

Clicks Per Search is the ratio of Clicks to Keyword Search volume. It shows how many different search results get clicked, on average, when people search for the target keyword in a given country. Learn more.

Parent Topic

Parent topic determines if you can rank for your target keyword while targeting a more general topic on your page instead. To identify the Parent topic, we take the #1 ranking page for your keyword and find the keyword responsible for sending the most traffic to that page. Learn more.