Direct advertisement is the form of advertisement on website it is customize by owner of blog and the advertiser pay to him for the publish their advertise on his blog or site its very easy to do because when some one interested in your site then they will contact you and ask you to about advertise their product on your site simply way for your site
advertiser that if you work for your advertiser and they  get nice result and traffic from your site then they will come to your site to publish their product and if they publish your site as a famous site for product advertisement then your site will popular but you have just post a unique topic to get a nice result about your site traffic for advertiser and earn more ...