Use this parameter to specify negative keywords, i.e. the keywords that you want to exclude from your results. Must be provided in JSON format. For example, an API call that contains "keyword=iphone&exclude=["case","game","price]" will return keyword suggestions for the keyword "iphone" but there will be no keyword suggestions that contain words "case", "game", or "price". Meaning, the keyword suggestion "best iphone price" will not show up in the results.