Where is the best place to find software for customizing your Hootsuite dashboard?

The Explore tab is the best place to find software for customizing your Hootsuite dashboard because it serves as a central hub where users can discover and integrate new applications and enhancements that can improve their Hootsuite experience. This feature allows users to easily navigate through various tools and functionalities, facilitating a smoother process of personalizing their dashboards according to their specific needs and preferences.

In the context of the other choices, while the Help Center provides valuable resources and tutorials, it is more focused on support and learning rather than app discovery. The User Marketplace and App Store are also relevant resources, but the Explore tab specifically highlights tools and integrations that can be connected directly within the Hootsuite platform, making it the most targeted option for dashboard customization.