Hi at all. I would like to know if quality score is different for each single campaign, or is unique for the account ?
quality score is actually different for each keyword in your campaign. it is calculated based on the relevancy of the keyword to your ad and your landing page. you can view the quality score of each of your keywords by going to your ad group, selecting your keywords tab, and then (if it does not appear) selecting the "customize columns" link right below the tabs.
thanks I have just checked but I have 7/10 quality score for each keyword.... Is it normal ? Is it good ?
Yeah, it's not too bad - you can improve on this by (in order of importance): 1) improving your CTR 2) making your landing pages more relevant to each ad 3) making sure your account structure is good (2 & 3 can interchange depending on how good / bad you are on either one)
Not quite sure what you are asking but I seem to remember reading something like the following somewhere in the Adwords help files (I paraphrase): Each keyword has its own Quality Score but any particular keyword will have the same quality score right across your account if it appears in multiple adgroups or campaigns. For example, if you have "blue widget" as a keyword for a search campaign and also for a separate content campaign then they will have the same QS. I think this applies to different match types also, e.g. if you have "red widget" as a phrase match in one adgroup or campaign and [red widget] exact matched in another they will also have the same QS.