Click Through Rate Help

Help Please

[Fbase21]

I am confused on how Google figures the click through rate - There are campaigns and under the campaigns are adgroups.

Google evaluates after 1000 impressions - Say i have 2 campaigns with 3 adgroups under each

After 1000 impressions does google evaluate both campaigns together to get its numbers OR does google evaluate one campaign after it has 1000 impressions and then evaluate the other seperately after it has 1000

Or am i completely off - Does it just evlaute the adgroups within a campaign?

So I am wondering if one bad campaign would hurt another - Id like to have a campaign or adgroup that I could mess with that would not affect the others?

Any assistance would be greatly appreciated

Nate

[Fbase21]

ANY TAKERS?

[eWhisper]

CTR as used in the bid rank & keyword status are based on each individual keyword.

You can experiment with keywords and groups without hurting your established campaigns.

[shorebreak]

eWhisper, our understanding is different, namely that campaign-level data is used rather than just unique keyword level data. I could be wrong, but we're managing over two million keywords in all, for about 25 different clients.

[eWhisper]

Shorebreak,

As far as the keyword status and bidrank formula go, I think it's only the keyword CTR that matters.

As far as how many impressions/clicks it takes for an account to be reviewed, that could be total impressions/clicks.

When an ad hits 100k impressions, its reviewed. There are probably other factors which put an account/ad/keyword into review.

However, as far as experimenting with keywords, one keyword will not hurt the CTR of another keyword - so experimenting is ok if the reason you're not doing it is because of repercussions to your money makers.

AWA can confirm this when he gets back next week when he gets back, but I think the above is true.

Quotes from AWA:

In terms of positioning, it is the CTR of the keyword in the moment it is searched on that matters - but this is a reflection of its entire history.

The most recent 1000 impressions are weighted (slightly) more heavily, though the entire past history is considered as well. Part of the reason for considering the entire past history it to protect a keyword that has worked well for a long time from being disabled if it has a truly miserable 'most recent' 1000 impressions.

From: [webmasterworld.com...]

Really, the Max CPC x CTR calculation pertains only to keywords, and is entirely separate from the CTR of the Ad itself. In other words, it is not the CTR of the Ad that partly determines position, but he CTR of the keyword itself, in the moment in which it was searched.

From: [webmasterworld.com...]