lots of keywords

[jackdack]

If I have 100 keywords which are performing OK and I add another 900 keywords to the same ad group, and these 900 keywords don't do so well (less click throughs), does having the 900 extra (bad/not so good keywords) effect the performance or costing of the other 100 keywords in the same ad group?

Is there any advantage of seperating the high performing keywords into their own ad group?

thank you

[inbound]

I would suggest creating separate ad groups or even campaigns, amongst other things you can target the ads better and mess about without worrying about damaging your history on your well-performing keywords.

1,000 keywords is probably too many to get the best results from just 1 ad; we have 20,000 keywords in one campaign but spread them over nearly 80 adgroups with different ads and unique landing pages for each keyword.

If 1,000 ads are all that you will be managing for a while then I would spend a good amount of time setting up things, if you don't you will probably end up changing things later (a mistake) or continually getting less-than-optimal performance.

[jackdack]

much appreciated, thanks for advice.
i'm trying to understand is having many poorer performnig keywords detramental to high performing keywords in the same adgroup - or does it make no difference to the overall adgroup? ie. is all calculating done on keywords as opposed to adgroup bundlings. thanks