A score that ranks supply paths by how clean, direct, and fee-efficient they are. Some DSPs and independent tools produce these ratings to help buyers compare paths to the same inventory. A high-rated path typically means fewer intermediaries, disclosed fees, and verifiable publisher authorization. A low-rated path means the opposite. Use ratings as a starting point, not a definitive answer. The underlying methodology varies by who's doing the scoring.
Ad tech glossary
Supply Path Rating
Technical definition
A scoring system that evaluates the efficiency, transparency, and legitimacy of different paths to purchasing the same inventory.
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