I was wondering if anybody could explain how to make a marketing bot

Like vitaminoo for example

The trouble with coding is you need to learn how to code first then learn what you need to do separate. Otherwise if a problem occurs you're pretty much screwed.

Learn to code with python and how to use .json and .py files (Find your preference) then try and establish this knowledge into an automated bot.
Also what nobody has covered here is time, if you intend to have it running 24/7 like Vitaminoo then you'll need a pretty beastly cooling source otherwise you're getting a toasted CPU/ PC fast.