I have found this interesting infographic about Bad SEO Agencies Vs. Good SEO Agencies. Thanks to one of my Facebook friend for sharing this interesting infographic with me. It tells you how to spot a good and bad SEO Agency.
You should also check Search Engine Optimization (SEO) Tips by Google as it shares some useful questions to ask an SEO agency before hiring them.
What You Should Really Know Before Hiring An SEO Agency?
“No one can guarantee a #1 ranking on Google.”
How To Spot A Good SEO Agency
I would suggest you to stay away from those SEO agencies which is still offering Mass Directory, Article and Search Engine Submissions. Instead of spending hundreds of thousands of dollars on link building campaigns you can focus on On-Page SEO (Technical Analysis, Keyword Research, Competitors Analysis, Meta Tag Optimization, Content Optimization etc.). Create more and more original content and it will attract links naturally which in turn will boost your rankings in search engine result pages (SERPs).