Optimization and Link Building
After the research and analysis is done, some of the initial optimization activities include redesigning the website and removing low quality links that might be harming the visibility of the website. Sometimes, instead of an entire redesign, code overhauling is done to make the website more SEO friendly. The extent of the overhaul depends on the particular website and the project.
On the other hand, some SEO methods are required to be carried on with such as high quality link building. This has to be constantly monitored and made better by keeping a tab on what the competitors are doing.
Stay Away from Black Hat SEO Companies
Black hat SEO companies are those that might be able to get you quick results but the methods they use are bad for the long term credibility of the website. This is why it is crucial that you stay away from some of the shady search engine optimisation companies that make claims they cannot live up to. The methods used by these companies will give you a bad reputation and Google will be able to see past it, thus bringing down your SERP rank.
Therefore, the working of search engine optimisation companies is so vast that it is impossible to explain it in a line or two. According to the individual needs of your website, they will incorporate ideas and devise a unique plan that works for you.