Google’s filtering mechanism for Ads is based on a number of factors. Let’s take a look at some of these factors:

1.    Relevance to content: This is the single most important Ad filtering criterion that is used by the Google AdSense program. In fact, it is this filtering concept that gives Google AdSense program an important edge over the other advertising programs. The Google AdSense program determines the main topics/subjects of the website content and serves the Ads that are relevant to the same. Since Google AdSense is a global program, the relevance of Ads is also checked with respect to geography and the language of the content on the website. Note that AdSense can actually be used in a number of languages not just English.

2.    Appropriateness of content: Websites are based on varying themes. There are websites that are based strictly on Adult themes while the other sites are family friendly ones. Since Google’s AdSense program is open to all website owners and advertisers (who comply with the AdSense program policy), Google also controls the content of Ads to prevent Offense to anyone who sees the Ads. Google does this by using sensitive language filters and language experts. Google uses strict rules and guidelines for conducting an editorial review on the content of Ads. It also asks you to provide information about what kind of Ads (e.g. sexually-oriented, war oriented etc) you deem as inappropriate for your website.

3.    Competition filter: Since Google serves Ads based on the content of the websites, it’s quite possible that the Ads of competitors get displayed on a website that sells a particular product or service. To avoid this, Google provides a facility to the website owners wherein they can specify competitors or advertisers whose Ads should not be displayed on the website.

4.    Choose your own: You can also choose default Ads to be shown in case Google AdSense program is not able to serve Ads to your website (due to unavailability of suitable Ads, etc)

Getting the Maximum out of Google AdSense: Strategy Classification

Google AdSense program has given an altogether new purpose to websites. Besides serving content or selling products and services, websites are now being used to generate revenue through serving Google AdSense Ads. The webmasters employ various strategies in order to extract the maximum out of Google AdSense program. There is no formal classification available for these strategies (nor can all the strategies be determined), however, the following 3 classifications are said to be more prevalent than the others:

Here is the list of AdSense related terms that you should know for sure:Page impression: A page impression is generally the same as a page view but the number of page impressions can sometimes be different than the page views. This happens when the page is viewed by a visitor but the AdSense code is not executed for some reason (which means that the Ads are not displayed to the visitor).Ad unit impressions: Whenever you get page impressions, you also get Ad unit impressions. However, the ad unit impressions are dependent on the number of ad units you have on your page i.e. number of ad units that get executed when the page loads on user’s browser. Note that the link unit impressions are also counted as ad unit impressions.Click:  A click (for the purpose of AdSense) is recorded whenever a website visitor clicks on one of the AdSense Ads. Note that a click on a topic in a link unit is not considered as a click.Click through rate, for the purpose of AdSense, is the number of clicks received by an ad unit divided by the total number of ad unit impressions for that ad unit. So, a better CTR can mean more revenue for you.

Effective CPM: It is calculated as the cost per 1000 impressions.  However, do not confuse effective CPM with your earnings. In fact, effective CPM is calculated by dividing your earnings by the number of page impressions and then multiplying the final figure by 1000. Effective CPM is generally used to compare various channels and determine which channels are more profitable for you.