Hello everyone, this is 
In the old times, the medium of communication used to be very less, that is why it was the most difficult task for any company to advertise its product, at that time there were only newspapers through which companies could do their advertisements, but the way technologies are increasing. In today's time, almost every person uses social media, that's why companies do not have to make a lot of effort to do their advertising and advertisement is very important for any business product, that's why companies 30% of their profits only on its advertisement.
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