Business Analyst is the professional who is focused on extracting useful information from the business data that is available to him/her to offer informed business decisions to help grow the businesses. Whereas, Product Analyst’s role is to manage the product lifecycle, identify key markets, analyze results, layout strategies for customers and obtain data of customer behavior with the product to enhance it to sustain it in the market.
If you wish to become a qualified and certified Business Analyst, I would recommend you to check out the Business Analyst course from Intellipaat. And watch the following video on the Business Analytics course made by domain-experts.