Product pages are connected using conservative signals from the existing catalogue: meaningful shared product-name terms and brand identity.
It creates useful internal navigation without inventing product categories, specifications, compatibility claims or performance equivalence.
This is a conservative lexical/brand relationship layer. It does not claim that two products are technical substitutes or manufacturer-approved alternatives.
Use dedicated pages for products, brands, services, local information and technical guidance. Manufacturer-specific claims remain source-gated; customer reviews are treated as experience evidence rather than technical proof.