I do courses on Udemy and this particular one is what underpins what I do. The bringing together of marketing and IT to automate/measure the effectiveness and/or communicate your relevant message to your target audience.
Most small businesses have a mine of useful data already locked up in their accounting system. By using this data and segmenting it, it can be used to create compelling, relevant offers or perhaps reinvigorate potentially lost customers.
You can access the course here.