Since the advent of the Internet era, many bookmakers’ betting web sites have been created for sports betting: some of them have managed to establish themselves with determination, others have fallen into oblivion again. However, there is a group of sites that can be considered as the best in this field and this is because it stands out for its high quality, for a wide range of bets, for interesting odds, for seriousness and for safety. Consequently, it also happens that the best bookmakers further expand their offer and that the customer has at his disposal an even wider range of bets. There are various criteria for evaluating the quality of a bookmaker and, therefore, recognizing the most valid sites. There are several factors that determine a quality betting site. First of all, there are some points that must always be taken into consideration with particular attention and that are an essential element for every good bookmaker. One of the most important issues of all is safety – considering that, however, you put your money at stake – which includes the secure processing of personal data and the guarantee of payment of your winnings.For the best bookmakers these two aspects are obviously part of the program. Unfortunately there are also those who do not respect these rules A valid bookmaker can also be recognized by the treatment given to its customers. How good is customer support? How long do users have to wait before getting their questions answered? Furthermore, the quality of the best bookmakers is determined by the size of the betting offer. Many disciplines are covered: obviously the main ones like football, basketball, tennis and formula 1, but also all other classical disciplines find space in the programs of valid betting sites. Think of horse racing, but also of golf, boxing and many other sports competitions.