With just a few steps, you can create a mobile app page that lets your users access the most important objects and items in your custom app.
Custom Salesforce1 app pages are built using Lightning Pages.
Before creating your page, determine which components you want to include and the global actions your users need.
Create the Lightning Page.
You can either use the Lightning App Builder in Salesforce or code the Lightning Page in XML and then deploy it into your organization in a package.
Add actions to your page.
Activate your Lightning Page in the Lightning App Builder.
Activation enables you to create a custom tab for your app page, set its visibility, and add it to the Salesforce1 navigation menu all in one place.