Here's a company I discovered while looking for some keyword analysis on my GeorgiaBeachHomes.com website, Wordstream.
Not only does Wordstream offer keyword advice and optimization, they have a suite of utilities to tune up your marketing campaigns. Wordstream is a Google and Facebook Premier Partner leading the industry in search optimization.
I like the design of their wesite too and they have a wealth of information for those of you just getting started with online advertising. Spend a little time reading though the Pay Per Click University and learn about bid management and conversion tracking.