If you choose to set your campaign to high priority, you can assign a
target for the number of impressions the campaign will have each day.
Everyday phpAdsNew will try to display the banners in your campaign exactly
as many times as you specified as the target. For example if you set the
target for a high priority campaign to 40000, phpAdsNew will try to display
the banners in that campaign 40000 times each day.
However this is not an exact science and this feature depends a lot on
predictions based on already existing statistics. Every hour phpAdsNew
will try to predict the total number of impressions it will get during
the day and how they are spread over the different hours. If a campaign
is falling behind on the predictions phpAdsNew will increase the probability
factor of the campaign in relation to the campaigns which are on schedule.
The prediction and compensation routines should be able to compensate
for all kinds of external factors, including display limitation and should
be able to spread the impressions of high priority campaigns evenly of
the course of the day.
The actual result will depend a lot on how consistant the existing statistics
are, therefor it is not recommended to use high priority campaigns with
only a few days of statistics available. If you do decide to use high
priority campaigns without a couple of days of statistics the prediction
and compensation routines will try to meet the targets you have set, but
it might not have enough data to spread the impressions evenly of the
course of the day.
Also keep in mind, phpAdsNew only adjusts the probability of each campaign
every hour and a lot can happen in one hour. If for example your website
is visited a lot more than predicted phpAdsNew is not able to compensate
for that until the next hour.
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