What does EUR/USD mean?
EUR/USD is short for European Dollar vs. US Dollar. EUR/USD 1.35 is translated as 1 Euro equals $1.35USD.
Why is the EUR/USD so widely traded?
The EUR/USD is the most widely traded pair because the Euro and the US Dollar are both considered to be very liquid, meaning that you can consistently put a large amount of money in a trade or take a large amount of money out with minimal movement to the price.
The benefits of trading EUR/USD
By trading a liquid pair like EUR/USD you will be able to make larger trades and pay smaller spread.