Use this tag for questions regarding Geometry Nodes, a modifier added to Blender in version 2.92 to manipulate geometry in a Blender scene.
Geometry Nodes are a node-based system introduced in Blender 2.92 that allows the user to modify the geometry of an object in more complex ways than normal modifiers.
It can be accessed by adding a Geometry Nodes Modifier to an object.
Geometry Nodes have made great strides in development since their introduction, and differ significantly from each other in some Blender versions.
In the post Geometry Nodes Overview you will find an overview of the nodes available in the different Blender versions.
More information can be found in the official Blender Manual.