Organizing your products into collections help make it easier for your customers to find what they need. Think of collections like categories for your products, they group like products together. Such as summer picks, bestsellers and t-shirts.
Resources
Start your 14-day trial with Shopify: http://bit.ly/shopify-start
Watch the Shopify 101 Masterclass on-demand: https://bit.ly/101-masterclass
Jumpstart your Shopify Launch: https://bit.ly/39QWe5s