Each page has a unique ID that can be used for page-specific styling or linking form snippets to a specific page.
To get your Page ID
Navigate to the relevant page you would like to get the id for e.g. a subscribe page.
Click the VIEW button in the tabs to the top right. or hover over the relevant page in the left-hand column and click the magnifying glass icon (screenshot below)
The page will open in a new window or tab e.g. https://125555.cmstrial.net/page/599476
Your Page ID is the number at the end after page e.g. 599476
https://125555.cmstrial.net/page/599476
Screenshot of how to preview the page to get the Page ID