This website template is built on the Showit platform. Showit does not have a shopping cart/e-commerce option built into the platform. However, you can integrate a shop into your website in a variety of ways. Each different e-commerce platform has it's own list of pros and cons. It really depends on what works best for your small business. The integration you see in this template is using Shopify Lite, but you can use the e-commerce platform that works right for you.
With e-commerce platforms like ThriveCart, WooCommerce (Wordpress Plugin) and Shopify Lite you can integrate your products right into the pages of your website. With others like the full Shopify platform, a hybrid website solution will serve you better.
There are many additional e-commerce platforms you can consider. It all depends on what fits the needs of your small business and your customers best.