Grouping layersIf the purpose of your advertising campaign was carrying out of sale the quantity (amount) of passes on a banner can give you one half of estimation of efficiency. Other half of estimation is what quantity (amount) of visitors of the given server in general has been interested in purchase of the goods offered by you. Thus, the real estimation of efficiency of such campaign can roughly be estimated (appreciated) as the attitude (relation) of quantity (amount) of passes to quantity (amount) of displays of a banner to the people, the goods interested in offered you (instead of it is simple to quantity (amount) of displays of a banner!). Percent (interest) of visitors of the server interested in the goods offered by you, it is possible to estimate (appreciate) by results of preliminary lead simple interrogation.
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