For our clients, we typically gain a few backlinks at the beginning of an SEO campaign just from this data alone. It also serves as a long-term guide for link building in the months to come as getting links from high-authority sites takes time and resources. The main benefit is that we have a starting point full of low-hanging fruit from which to base our initial outreach.
HubSpot also has a campaign tool that allows you to associate keyword phrases, related blog posts, emails and landing pages with a particular campaign so you can get a better idea of the overall performance. If a particular set of keywords doesn't seem to be bringing in new site visits or converting leads to customers, it might be time to search for alternatives.
When using the Keyword Explorer, Ahrefs will also produce the "parent topic" of the keyword you looked up, as you can see in the screenshot above, underneath the Keyword Difficulty meter. A keyword's parent topic is a broader keyword with higher search volume than your intended keyword, but likely has the same audience and ranking potential -- giving you more a valuable SEO opportunity when optimizing a particular blog post or webpage.