Direction for finding information on marketing for my business

I need to answer the below questions for my business and having trouble finding information on the internet.

a) How do I find out the digital foot print of our customers? How do I know their expectations, engagements and journeys?
b) How do I find the role our consumers play within the digital marketing environment? Can you provide some examples of model engagement conversations and interventions which could be applied by our consumers when accessing the market using digital technology?
c) What is a consumer behaviour journey on alternative digital platforms?