Understanding Grid's sections

Sections is a Shopify feature that effectively allows merchants to assemble pages from customizable components (or sections!). This means tons of flexibility, especially on the homepage, where you can add, remove and reorder sections with just a few clicks. Examples of sections include featured products, slideshows, collection listings, or videos. You'll access the customization options for all of them from the  Sections tab in the theme editor.

The content on your homepage is made up of  dynamic sections, meaning you can add and arrange as many as you want. Two notable exceptions in Grid are the Header and Footer, which are fixed to the top and bottom of your site and cannot be repositioned—these are called fixed sections. (You can, however, still customize their content.)

Some other page types also make use of fixed sections. To see if the page you're building has sections, open the theme editor and then navigate to the page you're working on within it. (For example, if you click through to your blog in the theme editor, you'll see that a section pops up for  Blog, giving you access to settings specific to that page.)