Clicking a listing after a search creates an implicit query–listing relevance signal. But users click listings near the top more often, even when they are not more relevant. De-biasing techniques aim to keep this position bias from distorting the semantic relationships learned by embeddings. section 4.2.6
Position bias in click data
A top-ranked listing may receive a click because of its placement rather than its relevance to the query. Treating that click as an unqualified relevance signal can reinforce position bias in the embeddings. section 4.2.6
