How Is the Relevance Index Calculated and How Should It Be Used?

The exact formula is part of our secret sauce to determine the relevance of queries and items. This index combines many indicators measuring relevance such as the Click-Through ratio (low is bad), the Average Click Rank (high is bad) and how frequently the item is queried or the query submitted (high frequency has more impact on relevance). Lower Relevance Index values mean users are not finding what they are looking for. Sorting queries or items by ascending Relevance Index is our recommended approach to focus on high-impact queries or items with relevance issues (see Identifying Relevance Issues).