Advertising can be done through several companies, yet the Most well-known and certainly one of the cleverest online advertising campaign manager is the adwords program, pending the adsense program. Targeting with respect to sites topics and your own chosen keywords is clearly the strong point, and CPC logics only get you to pay for traffic that actually reaches your page (CPM also possible). The automatic auction garantees that you only pay as much as needed to show up.
You can quickly jump on and create targeted traffic to your site, for as few as $5 setup, and cost per click as low as $0.01:
Other companies in the field of targeted textual advertising include oxado and clickintext.
