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How many Impressions or Clicks is enough to judge an ad's CTR?

5+ Year Member

Msg#: 3113283 posted 7:46 pm on Oct 8, 2006 (gmt 0)




10+ Year Member

Msg#: 3113283 posted 8:46 pm on Oct 8, 2006 (gmt 0)

if you only have 100 impressions per day but view those stats over a week I'd say that's pretty reliable. But obviously higher numbers bring more reliable conclusions.


WebmasterWorld Senior Member 5+ Year Member

Msg#: 3113283 posted 9:53 pm on Oct 8, 2006 (gmt 0)

you need to accumulate sufficient clicks to be significant - however many inmpressions that needs - 100 impressions and no clicks tells you little, 100 impressions and 50 clicks would be quite meaningful.

Look at how your number of clicks varies from day to day - I'd suggest you need about 10 times the average to get a decent estimate.

The content network can have some very dramatic effects on CTR for short periods though - possibly increasing impressions by more than 3 orders of magnitude but with much much lower CTR.

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