* Extensive research experience: They've conducted significant original research and published their findings widely.
* Teaching experience: They've demonstrated excellent teaching abilities over a considerable period.
* Leadership roles: They often hold leadership positions within their department or university.
* Significant influence in their field: Their work is highly regarded and influential within their academic discipline.
The specific requirements and responsibilities can vary between institutions and countries, but generally, a professorship represents the pinnacle of an academic career. Sometimes, a professorship is endowed, meaning it's funded by a donation, which often comes with specific research or teaching responsibilities attached.