When picking an SSD, what is Read and Write speed?

They are exactly what they sound like, reading or writing to the drive. Most of us spend more time reading then writing.

Reading is just that, reading information/data from the drive. This is info already there. Loading a game, word document, etc. Writing is saving information to the drive. So installing a game or saving a word document. When choosing an SSD you'll want to look for TRIM support and how well the memory controller works. Some drives have a high failure rate.

I'm not too good with SSDs, can you tell me if this has TRIM support and if the memory controller works well? Also why do I need TRIM support and a good memory controller I don't get it?

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

You'll probably want to read the Tom's SSD Review at the link below to get a better understanding of SSD's before you buy.

http://www.tomshardware.com/reviews/ssd-solid-state-nan...

Its more important to focus on the access time than either read or write speeds. If you use an SSD as a boot drive, then sequential reads and writes will not matter that much. Access time makes a huge difference though.