Where are film trailers shown?

Where are film trailers shown?

Trailers are shown on the television, online, poster campaigns, radio campaigns alike. This is for the purpose of giving massive coverage. Scenes may be cut in concern for the ages of the viewer.

A lot of film trailers appear to be on social media such as YouTube, Instagram, Facebook, etc. I have noticed that in a lot of film trailers, the film is always made to appear glorious, great and elaborate, an obvious effect of a film trailer. In most film trailers, a comedic scene is always thrown in to make an even greater impression.

An advantage of using all these platforms to advertise films is that it increases the chance that people will be drawn to it. It gives the incentive that the film is huge, not to be missed. It makes the film very elaborate, and the chances of people watching it increases dramatically.

A disadvantage could perhaps be the amount of money spent on it. If unsuccessful, time and effort could be wasted.
People also may not even focus on the adverts whilst watching TV. This contributes towards that factor. On average, more people watch TV than go to the cinemas. There is also the factor of piracy. People may just get the incentive to just watch it online. This can't be helped sometimes, because unofficial uploads end up bypassing copyrights.