A CPU with higher clock speeds and multiple cores performs some CPU-intensive tasks, such as rendering a newly edited video, considerably easier and faster than processors with lower numbers.
The most common brand of processor in laptops you can buy in the UK is Intel. However, Intel's myriad of marketing names for its various processors can make comparisons extremely tricky. In this guide ...
In the case of computers, the MHz or GHz speed is what the cores inside a processor chip run at, otherwise referred to as the clock speed. There was a time when the whole computer ran at a set speed.