concert
The Italian word 'concerto' is used exactly as the English word 'concert'. It denotes a musical performance given in public, typically by several performers or by one performer. It can be used in various contexts, such as, 'Ho biglietti per il concerto stasera' which translates to 'I have tickets for the concert tonight'.
Tonight we will go to Laura Pausini's concert.
This sentence uses 'concerto' to refer to a live musical performance, specifically one by Laura Pausini. 'Stasera' is a time marker that means 'tonight' and 'andremo' is a future tense verb meaning 'we will go'.
The concert was cancelled because of the rain.
In this sentence, 'concerto' refers to a musical event that was planned but did not occur. In Italian, 'è stato annullato' indicates a past action done to the concert (it being cancelled) and 'a causa della pioggia' means 'because of the rain'.
I bought the tickets for the concert.
Here, 'concerto' is again a musical event for which one may buy tickets. 'Ho comprato' signifies a past action performed by the speaker (buying), and 'i biglietti' means 'the tickets'.