How do I choose the right niche market for my online business?

First of all you should find out in which field you are strong and try to find a market where your ideas have a demand and then proceed to improvise on the niche with lot of content writing etc.,

Colleagues gave the answer required

Choose the product line which has proximity and the capacity to meet all promises and build a strong customer relations.  The product should be in demand and with wide coverage for customers with price competencies.  The creative part in marketing is another factor.