CTR is the percentage of people who click a link or ad after seeing it.
It is calculated as clicks ÷ impressions × 100. In ads, a strong CTR usually improves Quality Score; in SEO, better titles and descriptions raise organic CTR.
Compare CTR within the same channel and position — a 3% CTR can be excellent for one keyword and weak for another.
PPC is online advertising where you pay each time someone clicks your ad.
PPCCPC is the amount you pay for each click on an ad.
PPCConversion rate is the percentage of visitors who complete a goal, such as submitting a form, calling or buying.
PPCCost per lead (CPL) or cost per acquisition (CPA) is the average ad spend needed to get one lead or customer.
