There are a few reasons that your Adsense ads may appear to be unrelated to your content. Sometimes, the problem can fix itself, while other times, it can take some effort on your part to get your ads to match up with your website’s content. By figuring out why your Adsense ads don’t match your content, you will be able to serve more useful ads to your visitors, and in turn, earn more money with the Google Adsense program.
The easiest ad matching problem to fix occurs most often on new websites, but it can also happen on newly created pages of established websites. Because the Adsense crawler hasn’t yet visited the page, it doesn’t know what the content is about. This uncertainty can lead to unrelated ads appearing on your website. Luckily, it isn’t necessary to change anything to remedy this problem. More often than not, the problem will solve itself once your website is crawled by the Adsense spider.
"Having little written content can make it difficult for Adsense to serve matching ads. "
If your website has already been crawled by the Adsense spider, but you are still being served unrelated ads, then it will probably take a little effort before you start seeing Adsense ads that match the content of your website.
First, you’ll want to look closely at your content. Is there enough content on each page to draw matching advertisements? Having little written content can make it difficult for Adsense to serve matching ads. Consider adding more text to the page so that the Adsense crawler can make a more informed decision about which ads it should be displaying.
Is your content narrow in scope or does your page contain a wide variety of topics?
The next thing you’ll want to look at is the content itself. Is your content narrow in scope or does your page contain a wide variety of topics? Having too many topics on the same page can confuse the Adsense crawler, leaving your page with ads unrelated to the content. Try to focus on one topic per page if you want your ads to closely match the surrounding content.
If you have plenty of content written about a single topic, but you are still getting unrelated ads, then it might be worth optimizing your keywords. The Google Adwords: Keyword Tool is a great resource when optimizing keywords. Just type in what the page is about and the Keyword Tool will provide a list of suggested keywords that you can then incorporate into your page. Using some of the suggested keywords listed with higher levels of advertiser competition can help bring matching ads to your page.
There is another problem that could be causing your unrelated ads to appear, and unfortunately, it isn’t a problem that you will be able to solve. If your topic is of a more obscure nature, then it will be harder for Adsense to display matching ads. In fact, some of the most obscure topics don’t even have related ads to serve, and as such, only unrelated ads will appear on the page. Don’t worry, however, should an advertiser start a campaign in your niche, their related ads will automatically appear on your website.
There are a number of reasons why your website might be receiving unrelated Adsense ads. Luckily, there are a few things that you can do to help solve the problem like adding additional content and optimizing your keywords. If for some reason you still can’t get matching ads however, it isn’t the end of the world. Your website will still be displaying ads, meaning you will still have the chance to earn decent money with the Google Adsense program