Here we have for you some questions that you must ask these agencies so that you can narrow down your choice to the one that fits perfectly with your requirement and specifications:
Is it really a company?
This is important research that one must do as it might be not really an agency but just two people making a team.
People can easily make an attractive website and would want you to believe that they are an efficient company with different expert teams.
You need to select a company offering Google advertising services that have loads of experience and a big workforce. This will ensure that your account won't be neglected at any point in time.
The Kind of Services They Offer
This is an important question and the ideal answer must be their specialization in pay -per- click. In case they also work with search engine optimization, web designing, social media and a lot more, be careful as this is a clear red flag.
Some of the companies offering multi-services say they are able to offer PPC although it's just sideline. You have to get an agency that specializes in PPC only for your campaigns.