Your primary role would be to make our software product 'reach' as many people as possible on planet Earth. If later, life is found on Mars or Moon then your passion should be such that you would also want to reach aliens living on them.
All marketing would be only online. So you would be working only the computer.
You would work on multiple products. But the primary one would be Notezilla which is already #1 in its domain & has about 10,000 customers.
You need to be creative about initiating new campaigns to reach different segments of people over the Internet, measure how the campaigns have been effective in terms of visitors to our websites, buyers, revenue.
In order to reach, you may have to write marketing articles, communicate with potential customers (via email etc), inform existing customers about the newly launched software product, participating in forums who are already talking about similar products, tracking them, provide suggestions to improve our website as part of Search Engine Optimization (SEO) etc.
As an intern/fresher you will be under a mentor who would guide you. But you need to be able to grasp everything like a sponge.
You just have to be crazy about online marketing & happy about being alive in this beautiful world.