Google Trends is a free, powerful data exploration tool that allows marketers to see how often specific keywords, subjects, and phrases have been queried over a specific period of time.
Marketers use Google Trends to identify seasonal spikes in search demand (e.g., searches for 'tax software' peaking in April), compare the popularity of multiple keywords to choose the best one for a campaign, and identify rapidly rising breakout topics to create highly relevant, timely content before competitors catch on.