Cost per click, often called CPC, is the amount you pay each time someone clicks your ad. This number helps you plan your budget because it shows how far your money can go. If your CPC is one dollar and your budget is one hundred dollars, you can expect around one hundred clicks. Then you compare that with how many sales those clicks bring. If sales are low, you may need better targeting or better pages. Watching CPC closely helps you avoid spending too fast. How closely should beginners track this number?