Having a user-friendly website can influence your link building ability and popularity and, thus, your ranking. Also, an easy to navigate website attracts more potential customers and correlates directly to conversion rates.
SEO Tip: The Bottom Line in SEO is Text, Links, Popularity and Reputation
SEO Tip: If Content is King, Then Links Are Queen
Mobile Commerce Tip: Add Autosuggest
App Design Tip: Incorporate Branding In Your App