All of the websites we build are created with SEO friendly integration in mind. Essentially when you create a website, that is only one part of the process to let people know you exist online. Setting everything up with search engines (such as google, bing, and so on) has to occur so they know you exist and in a way help promote your website in the search results.
Ensuring that everything is setup correctly is a process in itself, so making sure it's done correctly the first time means avoiding all the pitfalls that can actually deter search engines from listing you on their search results. For example, repeating keywords to many times, hiding text, or misleading information about who you are, can all land you negative results.
The first thing someone does when they're looking for a service or product, is open their phone or computer, and go to google. The most popular search engine out there.
These search results you get aren't random, either. They are all defined by the ratings of the websites that pertain to the specific keywords that you're searching for. The longer you wait to start your search engine optimization, the longer it will take to raise your rankings to get noticed.