Yes, advertising is very important. It helps companies become more visible to people. When businesses advertise, they can show what makes them different from others, which is good for competition.

No, not all businesses need to advertise. Some small shops or services get enough customers because people talk about how good they are. They focus more on making their products good rather than spending money on ads.

It depends on what kind of business it is. Some new companies might need to advertise a lot to get noticed. But big, well-known companies might not need to advertise as much because people already know them.