There are several free tools available for conducting keyword research. Google Keyword Planner is a popular choice, as it provides insights into search volume, competition level, and related keywords. Google Trends is another useful tool, as it allows you to see how search volume for specific keywords has changed over time. Other free tools include Ubersuggest, Keyword Tool, and Answer the Public. These tools provide insights into related keywords and questions that people are searching for, which can help you identify new topics and keywords to target in your content.