I always do analysis and find many informations about the match that i want to bet. I'm a sportsbook gambler and it really works by do analysis before the match start. Well, it's different if you bet on gambling site that have provably fair like dice sites and casino because i think it's a pure luck on that type of gambling.
If you want to get profit then you need to keep on doing analysis so that you can get extra information on the team that you are goig to bet. For me that play for fun, that kind of thing is not goig to help me to get extra fun so I dont think that it is necessary thing for me that only play for fun without hoping for profit