The other way you can incorporate Lightning Components in the Salesforce mobile application is via the Lightning-Quick action or Global actions.
The difference between a global action and a lightning-quick action is that global actions are available from the Chatter tab (they appear in the top right in Lightning Experience) and are available across, while an object-specific action only appears in the record detail view of the object (provided they are part of the page's layout).
To make a Lightning Component available for a global action, use the force:lightningQuickAction interface on the Lightning Component. ...