In the Modern SEO landscape of 2026, “keywords” are dead. We now optimize for Context Vectors. And context comes from three distinct protocols: MCP (Model Context Protocol), WebMCP (Web Model Context Protocol), and the emerging UCP (User Context Protocol).

Understanding the difference is the key to mastering Vector Search Optimization.

1. MCP: The Backend Context

MCP is about high-fidelity, server-side data connections. It connects an Agent directly to a database, a file system, or an internal API.