What is Elasticsearch?
Elasticsearch is a distributed search and analytics engine, built for lightning-fast full-text search on massive amounts of data. It’s part of the Elastic Stack (ELK: Elasticsearch, Logstash, Kibana).

What can it do?

• Real-time full-text search

• Filter and rank results by relevance

• Analyze logs and monitor systems

• Power dashboards and business intelligence

• Work at massive scale — across millions of records

Common Use Cases:

• Search bars on e-commerce sites

• Logging and observability (DevOps, SecOps)

• Chatbots and AI assistants (semantic + keyword search)

• Real-time analytics platforms

• Recommendation systems

Why developers love it:

• Blazing fast performance

• Smart query DSL and relevance scoring

• Easy integration with Kibana for visual dashboards

• Scalable and distributed by design

• Works well with vector search and AI (like in Retrieval-Augmented Generation apps)

Whether you’re building a product search engine, monitoring system logs, or powering semantic AI search — Elasticsearch remains one of the most reliable and scalable tools available.