They are a PC [personal computer]..
Macs are physically very high quality, the same levels as other laptops in a similar price range.
Apple are the top most reliable consumer brand & have been for some years.
Software wise, they use a different operating system to other makes but are still just a PC.
The operating system is a lot more robust than Windows, being originally based around a totally different design philosophy and being much more secure and harder to damage or corrupt, software-wise.
[There are now a billion _times_ more malware/viruses that can infect windows than OSX or linux].
They don't run Windows programs so you have to start again and get used to totally different names for many programs, though they do mostly the same things overall...
They do not tend to have "gaming" grade graphics, though you can install the Steam client and get a large percentage of the overall available games you could get on Windows - if the machine can handle them.
Many majors software packages are available for Mac / Linux as well as windows, so eg. things like Chrome or Photoshop are not a problem.