Alter the content in ready-made Adsense sites
There are now lots of Google Adsense sites that are available in the market where you can upload it onto your web host and start making money straight away. You have to be very cautious when purchasing these websites as you could have your Adsense account shutdown.
The problem is the content. The first thing you check when purchasing a Google Adsense site is the content. Make sure that the content is original and that it is keyword optimised. The content has to be attractive to the human reader as well as helpful for the search engines. If the topic was Blog advertising Google Adsense and in the first 2 paragraphs you stuff this phrase all over the place, then the reader will not make sense at what you are writing about.
This is called keyword stuffing and search engines especially Google, frown upon this. The key is to write for the reader so that they learn something from your content and that it is written in a simple attractive manner. Then you can go back and add keywords here and there to optimise it. Interesting content will make the visitor return and read your website and/or blog again and again.
After purchasing the website, be prepared to rewrite some of the articles and also write some comments here and there by yourself. These can be reviews or sponsoring others websites. This will make the content original. The person selling you the website could be selling hundreds of copies of it and you’ll get penalised by the search engines if you do nothing and upload it to your web host.