Nick here from Shopify. Great questions!
You can add direct links to your policies by adding the following to the end of your store’s domain name:
For example, if your domain name was johns-apparel.myshopify.com, then a direct link to your shipping policy would be johns-apparel.myshopify.com/policies/shipping-policy.
Shopify has a great guide for store policies here as well as a youtube tutorial going through how to set up and add your store policies in detail.
Hopefully, this helps and don't hesitate to ask if you have any other questions!