Go to Website > Pages in the sidebar
Click the "New Page" button
Enter a "Name" for the page (required)
Enter a "Subtitle" if you want to specify meta data for the Page (optional)
Enter a "URL" string to override the default URL (optional)
Add content to the Page using the rich text editor
To Feature a Collection on the page Select the button next to the Collection at the bottom of the page
Check the "Publish" box to publish the page (or leave it unchecked to publish it later if you need to work on it before publishing)
Check the "Add to Menu" box to add a link to the Page to the site menu bar
Click the "Create Page" button