why advertisement is very important in this era?

   Due to the increasing number of population and there demand goods demand also increasing day by day. in my opinion, people only carrying about service and kind of things show in advertisement that the results that sales increased . and buyers increased.

people buy products based on the information that they taken from advertisement and see the usefulness of the product. due to this trend companies are selling more and more. in such cases, a massive publicity increase the selling power. 

for example, sales of smartphone is increased in this corona period because it's need of every person in this situation and also result of the massive advertising program acted by some  popular people's. people purchase product because it was advertised by a famous celebrity and never review the usefulness of the product before purchasing. 

on the other hand, certain buyer goods have increased sales as they are necessary for us. these kind of items do not need any kind publicity.. people buy the products as it is a daily requirement , like  maggie, food oil, fruit juice, cold drink etc. so, I am agree that according to need this thigs possible by advertisement but few needful items don't  needs publicity.

thank you for reading if you find any mistakes ,please let me know.