Memory Type: DDR3 PC3-10600, DDR3 (non-ECC)
Maximum Memory: 16GB
Memory or DRAM is the "working" memory of the computer. It's used to store data for programs (sequences of instructions) on a temporary basis.
Install Guide for your:
MacBook Pro 2.7GHz Intel Core i7 (13-inch DDR3) Early-2011
video - installing memory