Hello, hope you are doing well,You are right, when we bring our products to the market or we want to sell more old products, we advertise it, so our products sell more and people are more attracted to buy from it and we can also expand our business,yes nowadays bill boards, newspapers tv and social media is an important source of advertisement,wow you have advertised payment app , really enjoyed reading your blog wish you success 💐🎊🎉.