Sorry if this has been asked and answered before but I am trying to place multiple bet and I see this at the bottom and can somebody explain to me what they mean exactly?

You have 5 bets in your bet slip. Let's call them A, B, C, D, E respectively. You can make 1 parlay for all 5 bets (ABCDE). To do so, you just need to enter your bet size next to the "5 folds".
Or you can make 5 different parlays, each with 4 bets (ABCD, ABCE, ABDE, ACDE, BCDE). Since you will make 5 different parlays this way, you will see a "5x" next to "4 folds", meaning that your total stake would be 5x of your stake on each of the parlays.
Or you can make 10 different parlays, each with 3 bets (ABC, ABD, ABE, ACD, ACE, ADE, BCD, BCE, BDE, CDE). Since you will make 10 different parlays, you will see a "10x".