AdWords is Google’s advertising platform and can put you at the top of the search results instantly. SEO, search engine optimization is the process of creating content in your site that the search engines like, and so will rank you higher in the search results.
Google’s algorithm for calculating what goes at the top of organic search engine rankings (SEO) is very complicated and involves many different factors. Factors include unique and fresh content added regularly, backlinks, keywords, bounce rate and how long people stay on your site, domain age and many others (at least 200 factors).
In practice, most businesses will need to pay for some kind of optimization service, so the days of naturally ranking a site are rapidly being left behind! The process of SEO can also take months, and then you do not even know whether the keyword you are attempting to rank for is a profitable one!
If a business is going to pay, why not make sure you just get to the top! It is so much simpler and gets results faster.
The ads from Google AdWords are placed above the organic search results (search results from SEO). So you also get a much better place than from SEO, as you can see in the picture! Nowadays, SEO rankings are often not even above the fold!