To choose the best online poker platform, ensure the site is reputable and has proper licensing from credible gaming authorities like the UK Gambling Commission. Check for platforms that undergo regular audits by independent bodies such as eCOGRA to guarantee fairness and security. Additionally, select a site that offers a diverse range of poker games, including tournaments, sit-n-goes, and cash games, as this variety allows you to develop different strategies and keep the gameplay exciting. High player traffic is essential as it ensures you can find games at any time and match your skill level. Sites with more players also tend to have larger prize pools and more frequent tournaments.