Chunking is a method of presenting information which splits concepts into small pieces or “chunks” of information to make reading and understanding faster and easier. Chunking is especially useful for material presented on the web because readers tend to scan for specific information on a web page rather than read the page sequentially.

ChunkingInteraction Design Foundation
How Chunking Helps Content ProcessingNielsen Norman GroupMarch 20th, 2016
Chunking (writing)WikipediaMarch 16th, 2016
User Interface Design, Getting the Basics RightUX BoothOctober 9th, 2012
How to Chunk Content into Scannable PagesUX MovementJune 12th, 2011