Why is Adsense essential for your content site? First, let us look at how Adsense works.  An advertiser buys a banner or text advertisement and pays only when a potential customer clicks through to the advertisers site.  The rate paid is determined by market forces the sum paid by advertisers and to webmasters varies according to the value of the keywords. 

A website publisher or webmaster signs up with the advertising agent and pastes a javascript code on to their web page. Whenever the page is accessed it will display advertisements from the Adsense program, which are targeted by the spiders to relate to the web page content.  For example, if the site is about parrots you can see ads for parrot training lessons (that is not a joke: check it out).  There is no shortage of paying advertisers willing to generate Adsense income, as the targeting possibilities increase the effectiveness of their advertising spend.  

Every time a visitor clicks through on an advertisement, the website owner receives a share of the advertising revenue.  This is a win-win for webmasters no need to find advertisers, no rates to negotiate, no click monitoring, no invoices to issue. 

Adsense and similar advertising packages are good for content-rich sites and niche websites as they offer the chance to customise the appearance of advertisements to suit the websites needs.  Site owners can choose from many different advertising formats, selecting prominent boxed displays or lineage ads that look more like editorial content according to the tastes of their niche group. 

These options allow the website owner to present advertising in a format best suited to the target market, and improve click through rates from visitors who may or may not be aware of what they are clicking on. This way the advertisers gain improved exposure for their advertising and the website makes money. The recent improvements in the search engines give webmasters the ability to monitor advertising performance using customisable reports that show details of page impressions, clicks and click-through rates. Webmasters and publishers can now track specific ad formats, colours and pages within a website and spot trends.

With real-time reporting, the effect of any changes to advertising formats can be assessed quickly, and the site owner can react to consumer behaviour. The most successful formats can then continue and be replicated, and less popular formats can be scrapped.  With very little practice these ad tracking tools are easy to use and this makes them particularly useful to home business startups.  Advertising can be placed on a site in minutes, the site owner chooses whether to allow banners or text ads, and can block advertising from their main competitors. 

Adsense is all about targeted content if your content is rich in keywords it will attract quality targeted ads from the search engines. This is the part where the effectiveness is working its best.   There was a time when people were not aware of the money to be achieved from advertisements. The cash generated only came into existence when the webmasters and publishers realised how they can make Adsense be that generator. In those days, content was the most important factor, and taken quite seriously. That has not changed, but the smart webmaster can produce copy that satisfies the niche websites audience and provides quality spider food.