Google Trends is a free tool provided by Google and shows popularity and search volume on search terms and topics. You can follow the steps below to use Google Trends:
Go to Google Trends website (https://trends.google.com/trends/)
Type the term you want to search for in the search box and search.
Search results are displayed with graphs showing popularity for search terms. Graphs show search volume over time.
Click on the "Explore" tab to learn more, eg search volume for a particular country or region, search terms related to most popular countries or similar search terms.
In the "Interest over time" tab, you can monitor the change in search volume over time.
In the "Interest by region" tab, you can see how the search volume is distributed in a particular region.
In the "Related queries" tab, you can see similar search terms related to the search terms.
You can see similar topics related to search terms in the "Related topics" tab.
Google Trends is a very useful tool for understanding search trends and tracking search volume. It can also be useful when choosing keywords for SEO and PPC (paid advertising) campaigns.