Effective SEO helps get you customers. SEO helps your website to rank for search phrases that your target audience are using to find you and your competitors.
Most people only look at the first page of search results returned for a particular query. 53% of the time, it is the first search result that is clicked. As more and more businesses go online the competition for the first search result on the first page increases. The sooner you are able to begin SEO the better it will be for your website and your business.