In SharePoint, a page is a web page devoted to a particular subject—perhaps a report, a how-to article, a status update, or a specification or schedule. You can customize the layout and look of a page in many ways.
Web parts are the building blocks of your page. Each kind of web part is a container for a certain type of content—text, image, list, chart, and so on. You add web parts to your page, then fill them in with content.
Modern pages
Delete a page from a SharePoint site
Using web parts on SharePoint pages
Add or remove columns on a page
Add a page to a Communication site
Configure page approval using Microsoft Flow
Using videos on SharePoint pages
How to find your SharePoint pages and news posts
Use a different page for your SharePoint site home page
Classic pages
Modern web parts
Complete guide to all modern web parts:
Using web parts on SharePoint pages
Featured web parts:
Add text and tables to your page with the Text web part
Use the Document Library web part
Maintenance:
Open and use the web part maintenance page
Classic web parts
Buy an app from the SharePoint Store
Use the List and other web parts on classic pages
Add, edit, minimize, or delete a web part on a classic page
Connect a Filter web part to a List View web part on a classic page