This is a guest post written by Elisa Gabbert. Elisa is the Content Development Manager at WordStream Inc., a provider of search marketing software and services. She manages the WordStream Internet Marketing Blog and you can follow her on Twitter at @egabbert.
If you manage a Google AdWords account to supplement your organic search engine optimization efforts, you know there are a ton of metrics available to track and analyze, and it can quickly get confusing and overwhelming. Since we all have limited bandwidth, it’s a good idea to narrow down the field to a short list of key metrics that really give you meaningful insight into what’s working -- and what isn’t -- in your paid search campaigns.
When budget is tight,