What is? (for newbie)

Hi im learning in forex school now and have couple of questions that i would like to ask. As soon as i not gonna understand something ill ask here.
If you can help me, im thanking you very much.

1.What is Spread, Tight Spread and bid-ask spread?

One of the best resources on the internet is: Bid-Ask Spread Definition

Tons of great info there, and everything defined several ways.

In a very simplified nutshell, it’s the cost you pay to trade. The brokers will place a gap between the Buy/Sell rate, making you pay the difference upon closing a trade. Once you have made enough pips to cover the spread, you can make a profit.