What is the use of flexiPage in Salesforce lighting component?

FlexiPage Represents the metadata associated with a Lightning page. A Lightning page represents a customizable screen made up of regions containing Lightning components.
This type extends the Metadata metadata type and inherits its fullName field.
Lightning pages are used in several places.
In the Salesforce app, a Lightning page is the home page for an app that appears in the navigation menu.
In Lightning Experience, Lightning pages can be used:
To customize the layout of record pages, the Salesforce Home page, and the Email Application pane in the Outlook and Gmail integrations.
As the home page for an app.
As the utility bar for a Lightning app.