Contextual advertising .
One more specific feature of such kind of internet advertising is the way of its payment. transition is paid for the announcement only cliques, that is. the client does not pay quantity of displays. only direct use of the reference.
The most widespread search cars of a runet it yandex, rambler and google. accordingly, services on placing of contextual advertising are yandex.the runner and google adwords. if yandex and google work exclusively with own search portals the announcements placed on the runner show rambler, aport and set of thematic sites.
Necessity of a competent selection of keywords already it was mentioned above. besides, it is necessary to note and other subtleties of contextual advertising. it is necessary to make truly the text of the announcement, constantly to trace dynamics of cost of transition under the reference and operatively to react to changing conditions of a situation. only the knowledge of these details will make the advertising company really operating and making profit. it is not necessary to rely on own forces, and to entrust performance of this problem to the experts who have proved from a favourable side is better.