Suggest an editImprove this articleRefine the answer for “What does state normalization mean?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**State normalization** is a way to store data as a flat, related structure (by entity) rather than as nested objects. **Key point:** normalization simplifies updates, lookups, and synchronization between related entities.Shown above the full answer for quick recall.Answer (EN)ImageState normalization is a way to store data in state (a store, a service, etc.) **as a flat, related structure**, rather than as nested objects. Why it's needed: to simplify updates, lookups, and synchronization between related entities. ### Example Example without normalization: ```ts { users: [ { id: 1, name: 'Maria', posts: [{ id: 10, title: 'Hello' }] } ] } ``` If a post changes, you have to search for it deep inside the users array. After normalization: ```ts { users: { 1: { id: 1, name: 'Maria', posts: [10] } }, posts: { 10: { id: 10, title: 'Hello' } } } ``` Now you can easily update a specific post by `id` without touching the whole tree. The idea is the same as in a relational database: each entity is its own "table" dictionary (`entities`), and relationships are expressed through identifiers. ### Result - easier to update and cache data, - less duplication, - cleaner logic when syncing with the server, - fewer re-renders on changes.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.