Most of the people think that website designing and search engine optimization is the same thing. But you must know that these two are completely different things. As far as website designer is concerned it basically deals with designing a beautiful website. However as far as SEO is concerned it basically means online marketing. The SEO is the technique of improving the volume and quality of traffic so that more searcher visit the site and also the website should come at the top of the search engine list.
This is really something which requires some kind of optimization. SEO requires optimization in content and also optimization in HTML code so that the website comes first in the search engine search list. As far as web designing is concerned, if you are one of them then you will be just required to design the templates for the web page and also finally design the whole website so that it looks great. However at this level there is no provision that you have to take some step for optimization. This is really not the work of web designer. If you ask the same company to optimize your website then they will ask their SEO whom they hire to do the job. The web designers will have nothing to do with it.
The SEO take into consideration, that how search engine works and what the people are looking for. You will have some keywords which will related to the most common type of searches and also according to the type, your website is. You can use those keywords repeatedly in your contents and you will definitely soon find out that your website comes in the top of the search list.
You will have to keep in mind that what the people are really looking for. Accordingly you will have to change your content. You will see that more traffic will come to your website and you will definitely find yourself to be very popular within few days. But you really require a person who will do the optimization for you. He is called search engine optimization. You will definitely find it much better if you will go for the search engine optimization.
You should keep in mind that there are millions of websites and you will find that most of the people see only the first or second page of the search list. Hence if you will not o for search engine optimization then your website will never be visited by anybody. Yes advertisement will work but they are much more costly than SEO. You should really take advantage of SEO. However as far as website design is concerned it is too very important but is different from the SEO as I have explained you.