I disagree with some of the other experts here. Based on my own experience, there are cases in which an explanation of why you are applying to the specific office is relevant. But this depends on your situation:
Somewhere throughout your application, you need to give the recruiters the confidence that you know what you're getting yourself into when moving to that city. This can be done in your CV (e.g. you've lived there, studied there, etc) or in the cover letter. To give an example: When I review an application for an Amsterdam office from a US student that did an MBA in Singapore, I want to be confident that they don't leave us after 6 months because they realize they don't like the city.
This might not be relevant for all applicants, but it is an example of when you need to use the cover letter to make a very important point.
I disagree with some of the other experts here. Based on my own experience, there are cases in which an explanation of why you are applying to the specific office is relevant. But this depends on your situation:
Somewhere throughout your application, you need to give the recruiters the confidence that you know what you're getting yourself into when moving to that city. This can be done in your CV (e.g. you've lived there, studied there, etc) or in the cover letter. To give an example: When I review an application for an Amsterdam office from a US student that did an MBA in Singapore, I want to be confident that they don't leave us after 6 months because they realize they don't like the city.
This might not be relevant for all applicants, but it is an example of when you need to use the cover letter to make a very important point.