There are many ways you can use it such as if you want to show your current customers who worked with you, the services you provide or wanna guide them on how to use a certain plugin or WordPress dashboard you can easily do that by using this plugin.
So that whenever they will log into their admin dashboard they will always get exposed to you, your content, service, or tutorial which creates a high chance that the next time they think to hire someone to manage something on WordPress or building a site they will probably hire you for it.