Selecting a SEO/ SEM Company

How to decide which SEO/ SEM Company is better?

See if :
– Considering Link Building?
– Website Analysis : conversion , Behaviour and Tracking
– Guarenteed Top Position in offer?
– Traffic : Pageviews, Visitors : Quality of traffic generated.
– Competitor analysis (analysis of your competition /competitor’s websites)
– Clear roadmap for return on investment?
– Approach : Gradual or instant fix ?
– Manual Optimization or Using Templates/Softwares
– Spam Policy : Spamming www or Black-hat methods?
– Keyword research : Long tail keyword list?
– Organic SEO or SEO+SEM

Other:
– Past Experiences in Online Publishing/Marketing
– Client list and success stories
– PPC to Organic SEO Ratios and Implementation
– Billing Cycle and contract (short time or long term)
– Certified and experienced individuals