You should really think about it – as the people think about your blog – advertisers take a keen interest in your writing style and content and that’s why they opt for placing advertisements on your site. The other view, if you place affiliate links of advertisers in your blog – which most of us do – you should really do some favor.
Favoring in blogging sense is actually highlight your advertiser – and for highlighting you can write reviews about them and their products – this is also necessary if you want to have your earning raised.
As I have explained in my previous post – people are often searching for product reviews – so this is the best practice you can do.
On the other hand this will not be limited to favoring – but this practice will surely add up to your credibility as well.
If you want to have something – then you should first give something. The product reviews – if written correctly can also provide you loads of organic traffic.
With this done – advertiser might stay for a longer period with you – and if its an affiliate product you are writing review for and you get a higher rank – organic traffic with good sale numbers – you might reap the bonus.