It depends what kind of business it is to be honest. Most start ups focus on their product and worry about marketing and SEO later on. SEO is just a single in

It depends what kind of business it is to be honest. Most start ups focus on their product and worry about marketing and SEO later on. SEO is just a single internet marketing tactic and in all honesty until you have something worth marketing beyond friends and family, I wouldn't worry about it or any of the other internet marketing tactics you might consider until the appropriate time. With that said there is nothing wrong with creating an SEO frinedly site and blog early on. However I wouldn't get overly concerned about them until you really have something worth marketing. At that point you need to look at the marketing plan and I would be sure to include SEO as part of it. SEO really has three key parts. Good on page optimization, quality content creation, and high quality link building with solid anchor text. Do those three things well and you will succeed. I hope that helps.