Follow below article to get to know about How to install Shopify Theme.
# To install Free & Premium Shopify theme.
1. Go to Shopify Admin Panel.
# Click on "Explore Free Themes" to install free theme in your Shopify Store.
# Click on "Visit Theme Store" to install free as well as premium theme in your Shopify Store.
# If you are purchasing from Thimatic Shopify Theme Store then
Go to www.thimatic.com -> Select theme you like -> Check live demo -> make purchase -> when you make purchase, they will provide you zip file.
# Upload that zip file by clicking on "Upload Theme" button, as shown in below image.
# After, your theme gets upload Click on action button to get started with theme.
# Checkout this video to have a visible idea about How to install Shopify theme: