There are a few main features that content writing services offer: 

1. Quality content: A good content writing service will provide you with high-quality, well-researched, and engaging content. This will ensure that your visitors will keep coming back for more and that your search engine rankings will improve. 
2. Originality: A good content writing service will also provide you with 100% original content. This means that your content will be unique and will not be found anywhere else on the web. This will help you stand out from the crowd and will give you an edge over your competitors.