In order to find your broad and narrow audience segments, you can use keyword research tools like Google Keyword Planner, SEMrush, and Moz. These tools can help you identify the search volume, competition, and cost-per-click (CPC) of different keywords related to your products or services. You can group these keywords into broad and narrow segments based on their characteristics. For example, you can classify your keywords using criteria such as high volume, low CPC, low competition, and low relevance for broad segments; and low volume, high CPC, high competition, and high relevance for narrow segments. Additionally, you can use audience network tools such as Google Display Network, Facebook Audience Network, or LinkedIn Audience Network. These tools can help you target users based on their interests, demographics, and online behavior. You can then segment these users into broad and narrow groups based on their affinity and intent. For instance, you can use criteria such as high affinity and low intent for broad segments; and low affinity and high intent for narrow segments.