What Google Trends offers
Google Trends shows relative search interest for any query, with data going back to 2004. You can compare multiple terms side by side, filter by country or region, and drill into related topics and rising queries. It is useful for spotting seasonal demand before it peaks, validating content ideas before you invest in them, and checking whether a traffic change is specific to your site or part of a broader shift in search behavior. Interest is indexed from 0 to 100 rather than shown as absolute volume, so it works best for comparisons. Free to use, no account required.