Too much noise?

I made this city and it has this noise in a lot of areas, what can i do to get rid of them? Do i have to add more samples?

The noise issue could be due to a number of things, lack of samples, overbright materials, materials adding energy instead of conserving it ect…

We can’t say for sure unless you post an image that shows the noise problem.

I tried to upload it but I get this stupid error