Competitor credits determine the number of unique competitor sites that can be actively tracked in a campaign at any one time. 1 competitor site counts as one competitor credit.
Competitors on Competitor Discovery or Research do not consume competitor credits. Only competitors that have been added to a campaign use credits.
You can check your current Competitor Credit usage on the Usage and Billing page learn more
Competitor Credits are also shown any place you may be adding competitors, too, such as Competitor Settings or Competitor Discovery.