What character do you add after a search term to boost the term?

To boost a search term in Azure Cognitive Search, you append the caret symbol (^) followed by a numeric value that indicates the strength of the boost. Boosting is a technique used to increase the relevance of specific terms in the search results. When you apply this syntax, you effectively prioritize certain terms over others, improving the chances of those terms being more prominently featured in the search results.

For example, if you have a search term "azure^2," the term "azure" would receive a boost, making documents containing this term more relevant than those without it. This is particularly useful in cases where certain keywords are more critical for the specific context of the search.

The other options do not represent the correct syntax for boosting search terms and would not achieve the desired effect in Azure Cognitive Search. Therefore, using the caret symbol is the appropriate approach for enhancing the search relevance regarding specific terms.