Blogging is a great way to work on your SEO for your ecommerce business. 

Prisync said, "Search engines love sites that are regularly updated with fresh content and new insights. Fortunately, the freshness factor is factored into the algorithms, where search engines like Google send more traffic to a site when it’s regularly updated."

Find your niche in the industry and blog about that. It's always good to be producing unique, valuable content! Also, find consistency in your posting schedule depending on how many posts you can realistically create. 

Finally, talk about your own brand on your blog sometimes, but really stick to information about your industry. By establishing yourself as an authority in your niche, the sales will come!  "It’s okay to talk about your products in some of the posts where relevant, but ultimately, you want the blog to be a phase in your buyer’s journey that leads them further down to your product pages, which is where you can try all your sales stunts."