I never used AdWords, but I plan to use it soon. I read many tips about it but didn't understand how this thing work. So lets say I have now some campaign with poor quality score (for example, because I'm unexperienced in using AdWords) Will that quality score have effect on future campaigns I run, either for same site or other site? Thanks in advance
Account history will affect future campaigns. But, QS plays a factor. If you have several campaigns that are running low QS's, then guess what; you're future campaigns will have an initial low QS than they should be. So what is remedy? Create a new account. Adwords has nothing against that.