Colombian Legislation requires candidates to do their advertisement according to several rules, including expending tops, allowed places to advertise, allowed kinds of media, etc.
This is supposed to make elections more fair and accesible for more candidates, and avoid that over wealthy candidates gain an advantage. However, many of them do not respect this rules, surpass the expending limits, make illegal use of advertisement, or receive in their campaigns money from illegal sources, including terrorist groups or drug capos.
With Participa citizens can submit information they see about the candidates and their expending, whether they are legally placed or not, this information can help know more about the candidate, his expenditure, his benavioural ethics, and raise awareness about them.