PostgreSQL (often called Postgres) is a powerful, open-source relational database management system (RDBMS). It has been actively developed for over 30 years and is known for its reliability, robust feature set, and strong compliance with SQL standards. Unlike some simpler databases, PostgreSQL is designed to handle a wide range of workloads, from single machines to large web applications with many concurrent users.

Key features that make PostgreSQL popular include:

• ACID Compliance: Guarantees data integrity for transactions.
• Extensibility: You can define custom data types, operators, and functions.
• Advanced Data Types: Supports JSON, XML, arrays, and geometric data natively.
• Concurrency Control: Uses Multi-Version Concurrency Control (MVCC) for high performance.

For your hosting needs, PostgreSQL is an excellent choice for applications that require complex queries, data integrity, and the ability to scale. It is the default database for many modern web frameworks and is trusted by companies worldwide. Getting started typically involves creating a database and user through your hosting control panel (like cPanel or Plesk) or via command line. Remember to always keep your PostgreSQL version updated and implement regular backups for security and data safety.