2. The method of claim 1 , further comprising: in response to determining that at least one of the selected categories is ranked low with reference to the query relevance indicator values for each of the selected categories, identifying a pair of synonyms with a first one of the synonyms associated with a query keyword and a second one of the synonyms associated with a category keyword; and providing a recommendation that the query keyword be replaced with a synonym from the pair of synonyms.
2. The method of claim 1 , further comprising: in response to determining that at least one of the selected categories is ranked low with reference to the query relevance indicator values for each of the selected categories, identifying a pair of synonyms with a first one of the synonyms associated with a query keyword and a second one of the synonyms associated with a category keyword; and providing a recommendation that the query keyword be replaced with a synonym from the pair of synonyms. 3. The method of claim 2 , wherein the pair of synonyms is identified for the query keywords that have low keyword relevance indicator values for non-top-ranked selected categories.