A website provides free services, but there is an advertising slogan at the top of every page. What business model is used here?

The above is the conventional charging mode of Internet advertising, which is explained as follows:

1, cpm is one thousandth of the cost, charged according to the exhibition, 1000 exhibitions is a cpm. If the price of an advertising space is 5 yuan /cpm, then 5 yuan can show your advertisement 5* 1000 times.

2. cpc is the cost per click, and it is charged per click. If the charge for an advertising space is 1 yuan /cpc, then your advertisement is one yuan once clicked.

3. cpa, or cost per ation, is a mode of charging by action, which can usually be understood as charging by registration, that is, how much it costs to register a customer.

4.cps, that is, the cost of each sale, is a model of charging according to the sales share, which belongs to cpa.

5. cpt, that is, charging by time, is a mode of charging by time, also expressed as cpd, that is, how much is the daily charge?