Steps:

1. Add page & assign page template page.store-location
2. Customize Page Store Location

1. Add page vendor

• From your Shopify admin, go to Online Store > Pages.
• Click Add page
• Input Page detail Title & Content.
• At Template, Select a template for this page, select Template suffix = page.store-location.
• Click Save

2. Customize page vendor

• From your Shopify admin, go to Online Store > Themes
• Find the theme that you want to edit and click Customize
• From the top bar drop-down menu, select the page was created at step 1 from the top bar drop-down menu. eg. Store Location Page
• Click Store Location Page Section in Left Sidebar to Customize.
• Setting your Maps detail:
  • API Key: How to get API key
  • Geolocation service: If you select this option, it's will auto detect your visitor location base on IP location.
  • Configure store local: Get Latitude and Longitude
  • Map style: Json code you may get from other maps style http://snazzymaps.com/
• Add your store location by click Add Stores in Content block. Add your stores defail.
  • Store name
  • Store info
  • Operating hour
  • Store location
• Click Save