How do I use the keyword planner tool?

In the upper right corner, click the Tools & settings icon , then under “Planning,” click Keyword Planner. Type or paste one or more of the following in the “Find new keywords” search box and, on your keyboard, press “Enter” after each one: Words or phrases that describe what you’re advertising.

For More Information Please Refer: https://support.google.com/google-ads/answer/6325025?hl=en