There are any number of individuals and companies out there willing to sell you on-going search engine optimisation and guarantee you positions. So what should you do as an owner of a website to decide who is capable of making your website work harder for you?
A good start is to begin gently with an SEO audit of your website. The aim being to test what needs doing and where the best spend of your time and money is.
This article isn't comprehensive but will give you an overview of what you need to look out for when seeking to improve the search rankings of your website.
This means crawling your site or using a Google emulator to understand what a search engine sees when it indexes your site. With this information you can see what the search engine can see, what impediments there are and therefore identify what to fix.