Contextual advertising
Implementing analytics for contextual advertising in helps track payback and optimize budgets.
Bing Ads
Analysis of Bing Ads в Kashasha identifies the strengths and weaknesses of campaigns and allows you to optimize costs.

Yahoo ads
Yahoo Ads audit helps to identify campaign weaknesses and increase their profitability.
Google AdWords
Implementing analytics for contextual advertising in helps track payback and optimize budgets.