Shopify

Basics

Shopify has a large selection of videos and guides to help you, if you're just getting started:

Introduction
Adding Products
Adding Content
And more

Website Analytics

Setting up Google Analytics
Connecting Shopify & Clicky Analytics

SEO

The following formation was pulled directly from help.shopify.com and their YouTube page. If you're looking for additional resources, please check one of those.

How To Submit A Sitemap To Google Search Console
SEO Overview with Shopify
How To Add A Favicon To Your Shopify Theme
Adding keywords for SEO to your Shopify store
How To Add A Product
Image Alt Text
Page Titles, Meta Descriptions & ALT Tags

Looking for anything else, check:

Shopify's YouTube Channel
Shopify Help Center

Shopify

Basics

Website Analytics

SEO

Two Step