The best place to search for free (and paid) software for customizing your Hootsuite dashboard to your exact business need is called the:

The App Directory is the correct answer because it is Hootsuite's dedicated marketplace for integrations and applications that extend the platform's functionality. Here, users can find both free and paid apps to customize their dashboards, add new features, and streamline workflows. The Partner Library is a resource for Hootsuite's official partners, not a place to find apps. The Explore tab in Hootsuite is used for content discovery within the platform, not for finding software. While "Hootsuite App Store" sounds plausible, the official and correct terminology used by Hootsuite for this feature is the "App Directory." The Hootsuite Impact tab is specifically for accessing analytics and reporting features, not for finding or installing new applications.