Daily Page Impressions
Daily page impressions indicate how many times ads are shown per page. You can use your average, anticipated, or current daily page impressions for this

Click Through Rate (CTR)
This figure represents how many visitors actually click your advertisements. You can find this easily on your Google AdSense stats page labeled "CTR." The average rate is estimated to be about 1.5%.

Cost Per Click (CPC)
Your CPC is the average of how much you get paid for someone clicking one of your advertisements. To find your average CPC take you’re the amount of money you have earned from AdSense (daily, monthly, or all time) and divide it by your total clicks (daily, monthly, or all time).

Pay per click (PPC) is an Internet advertising model used on websites, in which advertisers pay their host only when their ad is clicked. With search engines, advertisers typically bid onkeyword phrases relevant to their target market. Content sites commonly charge a fixed price per click rather than use a bidding system.

Cost per click (CPC) is the amount of money an advertiser pays search engines and other Internet publishers for a single click on its advertisement that brings one visitor to its website.

In contrast to the generalized portal, which seeks to drive a high volume of traffic to one site, PPC implements so called affiliate model, that provides purchase opportunities wherever people may be surfing. It does this by offering financial incentives (in the form of a percentage of revenue) to affiliated partner sites. The affiliates provide purchase-point click-through to the merchant. It is a pay-for-performance model—if an affiliate does not generate sales, it represents no cost to the merchant. The affiliate model is inherently well-suited to the web, which explains its popularity. Variations include, banner exchange, pay-per-click, and revenue sharing programs.

Websites that utilize PPC ads will display an advertisement when a keyword query matches an advertiser's keyword list, or when a content site displays relevant content. Such advertisements are called sponsored links or sponsored ads, and appear adjacent to or above organic results on search engine results pages, or anywhere a web developer chooses on a content site.

Although many PPC providers exist, Google AdWords, Yahoo! Search Marketing, and Microsoft adCenter are the three largest network operators, and all three operate under a bid-based model. Cost per click (CPC) varies depending on the search engine and the level of competition for a particular keyword.^{[citation needed]}

The PPC advertising model is open to abuse through click fraud, although Google and others have implemented automated systems to guard against abusive clicks by competitors or corrupt web developers.^[1]