Randomised controlled trial finds that participation in private twitter groups doubles your chance of successfully giving up smoking.
Tags are what WordPress calls keywords. I attach a small number of tags to every post to help people navigate between content with the same keywords. Tags may be people (Robert Buckland, say), organisations (The Howard League, Revolving Doors Agency), themes (women offenders, homelessness) or specific items (heroin, cocaine, ROTL). If you’re looking to research a particular issue, they can be invaluable.