E-commerce SEO requires more detail than basic website SEO. This is because there are products that can be purchased on the website. Each of these products has elements that are important to the customer. There would be a Title, Description, Price, Available Stock, and Review or Rating just to name a few of these product elements.
It is important that each element of these products is accurate, but more importantly that the search engine is informed about these elements. The information must be structured in a way that is easy for the search engine such as Google to understand. If this is all done correctly your product will then have the opportunity to show these elements such as Price, Rating, and Availability before the user ever clicks off Google.