What are different strategies for API versioning?

Versioning strategies: URL path (/api/v1/users - most common, clear), Query parameter (/api/users?version=1), Custom header (Accept-Version: 1), Content negotiation (Accept: application/vnd.api.v1+json - RESTful). Considerations: breaking vs non-breaking changes, deprecation policy, documentation, backward compatibility period. Best practices: version major changes only, support N-1 version minimum, communicate deprecation early, use semantic versioning. GraphQL often avoids versioning through additive changes.