Is it safe to have a duplicated site just for PPC?

or does it impact on the original site?

[TravelSite]

Hi,

We've duplicated an existing website that does very well in the search engines, with the view to using it as a "ppc only" site (Google Adwords).

Aside from a different logo however, not much has changed compared to the original site.

I'm worried about effecting the high search engine listings that the original site currently has - e.g. if a search engine indexes a new page on this duplicated site, instead of the new page on the original site.

Hence I'm thinking about using a robots.txt file to ban search engines from indexing the (very slightly modified) duplicate site.

Is this the best move? Would this remove any danger of the original site loosing ranking?

Thanks

[bwnbwn]

My first answer would be no but then again it may be a good way to see what the roi of the ppc campaign might be without mixing organic with the ppc is really a pretty good idea.

yes add the robots txt to exclude all indexing but then again will this effect the adwords bot as well? This might be a good question to put in the adwords section to get a better answer on the topic.

[idolw]

You should disable all but google media bot via the robots.txt file AFAIK.
If you ban all bots incl the media bot your pages will be assigned lower quality score and hence clicks will cost you more.

[TravelSite]

Thanks for the info.

Would something like the following work:

User-agent: Adsbot-google
Disallow:
User-agent: *
Disallow: /

... or would I need to individually ban all user-agents one by one?