For example, if you bet “Over 2.5” the game needs 3 or more goals. If you choose “Under 2.5” the match must have 2 goals or fewer.
Buddy I think your explanation of under 2.5 isn't quite appropriate. Under 2.5 simply means that
the match must not produce more than 2 goals and not that it must have 2 goals. So if you stake under 2.5 goals and the result at the end the goals are either 2 goals, 1 goal or no goal at all, then you have won the bet since it didn't go beyond 2 goals. I hope you understand it now?
So if you bet under 3.5, it means not more than 3 goals,
If you under 4.5, it means not more than 4 goals will be produced in the match.
Before I place a bet, I always look at the weather, whether key players are missing, referee name, tournament type, and what kind of tactics the teams use.
Lol... Well you may have a point or your reason but if a team is a goal scoring side, they can still score goals. What matters is if the team are scoring team.
I also use AI tools to compare attacking strength and match history, which helps me get a better idea of the “expected goals” (XG). While there are websites available for this, I prefer using AI because it lets me analyze the data based on my own preferences.
Like I said above, there are teams and leagues that are known for producing goals. So you consider that. Generally, the league too matters. Like Seria A is not quite a goal producing league so must gamblers will bet on under for lesser goals). In such league like EPL, Manchester city is a scoring side, likewise real Madrid in LA LIGA. So betting on more goals in those leagues can be reasonable.
I’ve noticed that many of my friends always prefer betting on the 'Over' which I don’t really understand. Is there a secret I don’t know about?
Like I'm explaining too, over means betting for more goals. So the secret there is to search for teams who score more goals. Teams that are attacking sides that have forward strikers that are goal hungry will score more goals than teams who play defensive game.
Even when I lose, I learn something new. For me, that’s a big part of the fun.
That is the way gambling should be. Catch the fun and enjoy the game but that you have to do considering your risk appetite.
Now it's your turn: What kind of factors do you consider when placing Over/Under bets? Any tips to improve my strategy or how to find the best value bets possible? I’d love to hear your thoughts on this 
[/size][/center]
The tips are:
Under goals betting is predicting lesser goals from a match then it depends on the goals you are predicting on like under 0.5 means 0.0, under 1.5, under 2.5 etc. You need to look for teams that don't produce much goals.
Likewise for over goals, it is for more goals in a match. You need to look for teams and leagues that produce much goals.
You can understand more discussion from this link