How do I choose an effective and reputable campaign manager?

I'm looking to replace my current campaign manager and need advice on how to ensure I choose correctly.

 

Make a list of prospective campaign managers and then search on Google to find reviews that let you see how reputable are.

 

You ask them questions. It helps if you have answers yourself so check Adwords FAQ for questions to ask and answers.

A good one to ask: How are ads ranked? In Adwords and other major PPC services, by bid and ad quality, which is CTR. This is so basic, if they don't know, cross them of the list.

Check the Adwords guidelines and policies for more potential questions and answers.

 

Perhaps this could help: http://www.topseos.com/rankings-of-best-pay-per-click-management-companies.