Stack Overflow

Stack Overflow is the world’s largest technical Q&A platform for professional and enthusiast programmers. Founded in 2008, it operates on a unique reputation-based system where users earn points for helpful contributions. The platform features:
Strictly moderated programming-related questions and answers
Tag-based organization (7,000+ tags like #javascript, #python, #sql)
Voting system to surface the best solutions
Duplication prevention through active community moderation
Integration with Stack Exchange network (170+ specialized Q&A sites)

The platform serves as both a problem-solving resource (with 21M+ questions) and professional portfolio (top answers showcase expertise). While basic use is free, Stack Overflow for Teams offers paid private collaboration spaces for organizations.

Key Statistics:
✓ 100M+ monthly visitors
✓ 21M+ questions asked
✓ Supported by Stack Exchange Inc.