Google Trends is a great tool from Google to find popular keywords based on people’s search on the Google Search Engine or Internet. I took the following 4 diet related keywords (keto, vegan, paleo & low calorie). As per Google Trends, you see what most people are searching in the United States past 90 days about diet. You can see in the below snapshots!! See the state-wise search result So, based on Google Trends, we can discover the trending keywords.