The acronym SEO stands for search engine optimization. SEO involves a variety of techniques and strategies that are designed to help you gain more online visibility for your business. The ultimate goal of SEO is to get your product or service ranked on the first page of the search engines (Google, Bing, Youtube).
When you conduct a google search you will see a variety of results. At the top and bottom of the search results you will see ads. Google offers a select number of spots to companies willing to pay to appear in Google results for specific keywords that visitors type into the search engine. These ads can be quite costly.
Between the paid ads you will see multiple companies listed in the results. These companies did not pay to be listed...they got to the 1st page through their SEO efforts alone. These results are known as organic or natural listings.