This document summarizes a presentation on web scale discovery and the importance of metadata. It discusses how web scale discovery has evolved from previous discovery tools to provide a single search across local and subscription collections through a pre-harvested central index. It emphasizes that metadata has become the true ruler of the realm, as descriptions of content are used to generate purchases and access. The presentation outlines best practices for creating comprehensive metadata, including using standard identifiers, adhering to metadata standards, and developing policies for uniform data creation. It also discusses potential pitfalls to avoid, such as inconsistent naming conventions and lack of subject classifications.