Last is short for Last Trade Price, which is the price of the last trade made on the market (bought or sold). It is not the Ask or Bid price.

Change is the current price subtract the last day's close price. Also in percentage form.

Bid/Size (weird formatting) is the current Bid price (the price somebody wants to buy the stock at), and the size of their share lot (they want to buy 1 share). Same goes for Ask/Size, except that it's for selling stock.

Volume is the current total number of shares traded during the day, regardless of buy/sell.

GOOG : NASDAQ GOOGLE INC

Last: 584.78

Change: -0.09 (-0.02%)

Bid/Size: 583.60/1

Ask/Size: 584.74/1

Volume: 1618764

52 week high: 604.83

52 week low: 502.80

as of 7:56 PM ET 7/15/2014

what does Last, Change, Bid/Size, Ask/Size, Volume mean?

thank you!!!!