The numbers mean odds for football or 'soccer' - 1x2: the first one is home win the 2nd one is the draw, draws have the highest odds, the last one is away win.
Now, you have to bet on these lines as soon as they open because with nearing the start of the match they tend to drop because people start to put money at the bookies and the odds decrease.
Also, when people are betting on a line, it decreases and the opposite line increases because the money moves like on a scale you put more on one end - it dips and the other end lifts.
I hope you understand how it works now.
Thanks a lot for the explanation now it's more clear.
What I'm still missing is if we still have to choose which event, between 1 (home win) X (draw) 2 (away win), we have to bet on or we have to bet on all three in different moments taking advantage of the odd changes in a way that whatever is the final outcome it will result in a win for us?
Because I still can't get what was his bet here for example:
16 Feb, 19:45 Conference South : Truro City Hemel & Hempstead:
2.30 →
2.00 3.30 →
3.60 2.75 →
3.10RESULT:4 : 2 WIN ✔ first match succesfull
I mean why he defines those as "valuebets" and not simply bets?