CPM means Cost Per Thousand. (M is the Roman numeral for thousand – and so Cost Per Thousand).
This is the amount you will pay the ad-network or website publisher to show your ad a thousand times on their website or across their ad-network.
Whether your ad is shown only once to each visitor (Unique Impressions) or any number of times – is something that you will have to work out with the nad-network or the website.
CPM rates were once (pre yr 2000 bubble-burst era) as much as $75, but have now dropped to as little as $1 CPM.
CPC means Cost Per Click. This is how much you would pay the ad-network or website every time a visitor clicks on your banner. CPC rates can be as high as $3 per click or as little as 5 cents per click. It depends on your product and your market – amongst other factors, the more competition there is – the higher you will probably end up paying as you compete with competitors.
CPA means Cost Per Action. The Action could be any of the following types of actions – A visitor clicking on your banner coming to your site and filling up a simple enquiry form (CPR – Cost Per Registration) , or if the visitor makes a purchase (CPS – Cost Per sale). It could be a flat fee or a percentage commission of the sale made. Affiliate-Networks like commissionjunction , linkshare and clickbank have very good software systems in place to track all this and provide statistics to online merchants and publishers on their network of websites.
I have explained in detail what an Affiliate Network is, in another section. They basically, allow publisher websites to sign up for free so they can start earning commissions on sales arising out of the traffic they send to online merchants. The Affiliate Network tracks all this using their system and code merchants and publishers are required to place on their website. Publishers can sign up for free mostly, and in some cases online Merchants are required to pay a one time setup fee and possibly a monthly fee with commissions – eg. As in commissionjunction. A very popular site that is free to Merchants is Clickbank network.
CTR is Click Through Rate. This is the percentage rate at which people click on your ad banner. If your banner ad is seen by 100 people but clicked by one person – then it’s CTR is 1% or .01
Similarly, if your ad banner is seen 100,000 times and in the same time period it is clicked 2000 times – then your banner CTR is 2% or .02 .
This is how we calculate CTR …
(Number of Clicks / Number of impressions) x 100
Example, for above case it would be –
(2000 / 100,000) x 100 = .02
CPM, CPC or CPA … which is best for my ad campaign?
Your choice will depend on various factors. Sometimes companies such as Pepsi, would just like to enforce their brand and be seen across many websites, without any need for the user to click on their banners. This is a brand hammering strategy, and a CPM deal would be preferred.
Apart from the above mass branding effort, the decision to go for a CPC, CPM or CPA ad becomes a calculated decision when you have a product that you want to sell on your website.
Would you pay the publisher for only visitors he sends you? or would you pay him for every thousand ads he displays for you?or would you pay him a commission on sales from visitors he sends you?
This is tricky. You may need to read the paragraphs below slowly, or even several times over to get the gist of what I am saying …
To help you decide, you should first run a pilot CPM campaign that will help you gauge results. Your CPM campaign and number of Clicks on your banner, will let you know exactly what your CTR (Click through Rate) is for your banner.
Your CTR will help you decide your campaign type – CPM or CPC ? If your CTR is high, you should go in for a CPM, if its low you should go in for a CPC.
The reason for this is simple. If you have a low CTR then you would rather only pay for the low traffic that comes to your site. If your CTR is high , then you don’t mind paying CPM – because your cost will not escalate for more and more visitors that come to your site, but will remain the same.
I will explain the above, with a couple of examples –
Lets suppose a website that you want to advertise on charges a CPM of $5.00 and a CPC of 50 cents.
And, you need to decide if you should go in for CPM or CPC ?
Lets suppose you first buy 1,000,000 impressions.
This works out to $5000 ($5 per 1000 impressions x 1000)
Now lets suppose your CTR is not good and is 0.2 % (or 2 clicks per 1000 ads)
Now, you need to calculate the amount you will pay of you had bought a CPC.
If your CTR is 0.2% and you display 1,000,000 ads, then this works out to …
.002 x 1,000,000 = 2000 clicks.
So essentially you have paid $5000 for 2000 clicks or $2.50 per click!!
This means that I am better of buying on a CPC basis, because one click there costs me only 50cents! And if I go for CPC, then I will get 10,000 clicks for $5000 … which is 5 times more than the clicks i get in the CPM model (2000).
Lets assume that your banner ad turns out to be very good and gets a very good CTR of say 5%
Now you need to decide ..CPM or CPC.
Lets analyze as above –
I paid $5000 for 1,000,000 ads at 5% CTR
That means 5% x 1,000,000 ads were clicked on , which equals
= .05 (5%) x 1,000,000 = 50,000 clicks!
So for $5000 i got 50,000 clicks.
Now, if I had bought on a click basis, then at the CPC rate of (50cents) I will pay
50,000 x $0.50 amount for 50,000 clicks, which is $25,000 (5 times what I would pay with CPM, for the same traffic)
So, I am better of buying with a CPM system for this banner ad campaign
What about CPA ?
I have dedicated a separate chapter for this. This system is gaining popularity slowly. It seems to be the fairest system of all the three methods – specially when you are selling a product or service. Both Google and Yahoo are leaning towards taking their CPC system into a more fair and measurable CPA system. Google has recently launched Google Analytics and Google’s version of PayPal (Google Checkout) – that is a positive and firm step towards its CPA plans.
Selling ad-space on your website – how much can you charge?
Nowadays CPM rates have fallen from highs of $50 to $10 to $2 in many cases.
If you have high traffic you may approach ad-networks, and they will serve out the ads for your website. They will give you a piece of code to insert into the pages of your website. You will get a Username and Password to login to a control panel area on the ad-networks main website, to see how your site is performing. Ad-networks pay you based on CPM or CPC, depending on what their client (the advertiser) opt for. They will take from 40% to 60% commission. This is acceptable, considering the fact that they get you the clients and revenues, and they have to manage all the advertising technology and payment systems.
Most of these ad-networks require that you have a certain number of impressions per month to qualify to become part of their network of websites. For example, DoubleClick requires at minimum 5 million monthly page impressions. There are many mid sized networks, like Advertising , fastclick , ValueClick (only CPC, owned partially by DoubleClick) and even smaller ad networks like, burstnet . You should visit adbalance to get a complete list and brief on popular ad networks.
Banner Management Software
If you would like to manage your own Clients and their banner ads for your website, you will need to develop an ad-serving engine or license a third party engine and install it on your website. You can get a list of free and paid software scripts that you can install on your website from cgi-resources.com or hotscripts.com
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