why do big companies introduce new products frequently ?

?

as far as I have ever noticed , there are two major factors for big companies to introduce new products from time to time .

1st?the latest products introduced to the public will be standing a chance to?draw attention of consumers , as a consequence sales will get improved which create economic benefits?, for example ,.....

2nd?introducing new products frequently makes a way for companies to establish and maintain a positive image among potential clients , since there is a sort of creativity or innovation to be found , for instance ,.....

?

what are the benefits of advertising ?

?

as far as I can tell , there are two major benefits?out of advertising in today’s society .

1st?as for commercials whose aim is to introduce products to consumers , the benefit is to let clients know what there is in the market , as a consequence the sales of what has been advertised may go up , for example ,....

2nd?when it comes to public service advertising?, a realistic benefit is that the society?as a whole will get improved and become harmonious , since it teaches citizens how to behave?properly , for instance ,....

?

?

?

?

?

?

?

?

?