Easiest way to think of a Pip is it is the second to last number of a symbol.
For example EURUSD: Current ‘Buy’ Price is 1.13115. The number 1 next to the 5 means 1 Pip (with the 5, it would be 1.5 pips)
If you were to have a 300 pip movement, you’d be looking at that price moving to 1.16115, which could equate to a $300 gain, however, it depends on the lot size you’re trading, as well as your account currency.
So if I was trading 30 standard lots of EURUSD, and my account currency is USD, then I would be looking at a $300 USD profit. But if I was trading only 0.30 mini lots of EURUSD, I’d only be looking at a $30 USD profit.
Hope this makes a bit more sense.