Everyone with brand built on a domain name. There are many reasons you might care about typos of your domain, however we've highlight a few core areas through our Signals:
Malware/Phishing - Typos of your domain may be used to phish for data on your users, install malware, or disseminate spam.
Traffic - New users, loyal customers, and visitors responding to your marketing may be ending up somewhere other than your brand when they are trying to navigate to it.
Advertising - There may be infringing advertising on typos of your domain and/or you may even be purchasing traffic directly from typos of your own domain. It may also be a secondary signal that a domain name is receiving traffic.
Predictive - Especially if you brand is new, you may want to think about which domain typos are highest risk and where possible make defensive registrations. Predictive signals can also help you decide which domains to investigate when there is no other data available from other signals.