The following forums are where we believe most users ask their Bitcoin Core questions.
BitcoinTalk Technical Support is a sub-forum dedicated to providing help for Bitcoin Core and other Bitcoin programs.
/r/Bitcoin is a Reddit community that occasionally features questions about Bitcoin Core. Currently, very few questions receive enough upvotes to be featured on the front page, but you can always check the new queue or answer questions on the popular Mentor Monday thread (usually posted around noon UTC on Monday).
/r/BitcoinBeginners is a Reddit community that prominently features questions from inexperienced Bitcoin users.
Internet Relay Chat (IRC) is the most popular way to get live online help with Bitcoin Core. When providing links to documentation, most chatrooms require you post full links (not links shortened using services like TinyURL or Bit.ly).
The links below will get you started using an IRC web interface. Many serious IRC users use a native IRC client.