i think bro manzambi is saying that in terms of setting some buzz to kickstart the career,like robinio for example
rumbas can easily be unnoticed at first especially when bigger artists around are releasing or there is too much buzz around or the rumba has to be very good or catchy chorus to hopefully start something
also we are living an era were the manicke,ken mpiana and co can get a daily buzz more than a whole album of some artists after months so you gotta really up your game and hope luck is on your side