SharePoint introduced Flexible Sections in January 2025, allowing web parts to be positioned anywhere on a 2D grid rather than strict column layouts.
Feature: Web parts can be resized, overlapped, and grouped freely
Templates: Over 50 section templates available
Mobile behavior: Overlapped elements stack vertically on mobile
Developer support: SPFx v1.21 adds flexible layout configuration
Limitation: Not all web parts support all resize options
Flexible sections enable more creative page designs without custom development. Site owners can create magazine-style layouts, overlapping content blocks, and asymmetric designs. SPFx developers can configure how their web parts behave in flexible layouts via manifest settings.
Sources: Microsoft Tech Community · PnP Blog