What product promotion is the most suitable for CPA advertisement?

Advertising | to promote the definition of CPA advertising. CPA (cost-per-action): The cost of each action, that is, the pricing model based on the action taken by each visitor to the online advertisement. There is a specific definition of user action, including the formation of a transaction, the acquisition of a registered user, or a click on an online ad.
Actually the action this so-called "movement" may include many, buys the product also counts as the action, but now takes this kind of individual to take out is called "CPS". Registration, posting, etc. this is the action, there are separate call this "CPL". But in general, we often say that CPA can be understood as registered members, download installation and so on.

registered members and software download installation products are most suitable to use the CPA advertising billing methods to promote. these two kinds of products are convenient for the effect of billing, that is, how many members are registered easy to statistics, how many netizens downloaded your software and installed it is easy to monitor. On the other hand, this kind of products you can also through search engines, brochures, window ads, click Ads and other forms of promotion, but the specific effect is difficult to integrate analysis.
The advantages of CPA promotion is obviously easy to see, for advertisers, there is no risk, but for the promotion of service providers or site owners is a relatively headache, why netizens to register as your members, why use your software, because now most projects are not unique, often similar products have a lot. such as Taobao, the popularity of the project has a strong strength continue to push the advertisers are also few.
Good push products are in fact very easy to define, products by the audience, the more users to help the larger products are more easily accepted by the majority of netizens.

so how to evaluate the effect of promotion? The site has hundreds of millions of members, software also has a large number of users to download the installation, then the member's active degree or the retention rate of the software is important to evaluate the effect of the data, calculate the cost of each active member is how much, Mr. Chen Yizhou said, to recruit an active netizen price hundred, you think?