# Neighborhood Aggregation

> Source: https://sukruyusufkaya.com/en/glossary/neighborhood-aggregation
> Updated: 2026-05-13T21:05:55.716Z
> Type: glossary
> Category: derin-ogrenme
**TLDR:** The core GNN operation by which a node updates its representation by collecting information from its neighbors.

<p>Neighborhood aggregation lies at the center of the distinctive computational logic of graph neural networks. Each node combines its own features with messages from its neighbors to form a more contextual representation. As this process repeats across layers, broader graph structure becomes learnable. A significant part of GNN performance depends on the choice of aggregation function.</p>