Become a Data-driven Journalist
Google Trends: Understanding the data
How Trends works.
Google Trends analyzes a sample of Google web searches to determine how many searches were done over a certain period of time.
For example, if you’re doing a story about the zika virus and you want to see if there was a recent uptick in searches on the topic, select “Past 5 years”. Trends analyzes a sample of all searches for “zika virus” within those parameters.