How to research your personas
Creating robust personas requires a mixture of research and an iterative approach. The best starting point for B2B marketers is to speak to your sales teams. They often have the best understanding of decisions makers within a business and the challenges and priorities the different roles tend to have.
Speak to your account managers too. They will typically have complementary insight and can help to arrange interviews with customers so you can learn straight from the horse's mouth.
Further insight can be gleaned from keyword research, literature reviews and primary research such as quantitative surveys.