Keywords become irrelevant when they consistently produce content about consumer products, cosmetics, unrelated industries, or entertainment and do not contain grade definitions, binder content, test methods, or equipment data. Keeping them harms B2B targeting by bringing unqualified traffic and poor leads. Industrial applications depend on standards compliance, stability, breaking behavior, and equipment calibration. Filter out terms that return non technical “creams,” DIY chatter without specifications, or misleading MSDS references not tied to a real industrial product code. Replace them with terms linked to grades, test methods, plant sizing, and procurement documentation.