What is a L2 cache and what is the difference between the sundry types??

I purchased a tentative laptop that has have a 2.0ghz dual core processor with a 4mb L2 cache. What the heck is the difference next to the 4mb cache compared to something like a 2mb cache. There are similar question that were posted but the responses to them are written surrounded by extremely wordy ways. I am not the sharpest person when it comes to computer lingo, so keep the responses short, sweet, and forgivable. Thanks!!

Answers:
the amount of space available on the chip for instruction sets, it doesn't have to budge to ram or the tough drive to get the instaructions so its faster.. a p3 have a 512kb cache and a celeron had a 128 kb cache however the processor was impossible to tell apart except for this but the pentium costs more because of the increase in activities
Basically it is the space that your processor has to relieve do it's job. The more it have the more that it can juggle. That is as basic as I can hang on to it.

If you don't know the terms after it's not something you should even worry more or less.
There is L1 and L2 cache and the L stands for level. L1 is faster than L2. The difference between 4mb L2 cache and 2 mb L2 cache is the amount of information that can be stored in cache. The more facts your cache can hold the quicker your processor can run because it does not have to hang about for data to be pulled from RAM , which is much slower than cache.
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