Twitter is changing the way information spreads online. Links that would have been blogged a couple of years ago are now more often shared via the micro-blogging service instead, which fundamentally changes strategy when trying to get content to spread.

Publishers can complain and wistfully wish for the good old days of blog links and Google juice, or they can adapt to the new reality Twitter represents. Getting your content “ReTweeted” on Twitter (i.e. getting people to repeat what you’ve said, usually along with a link) can drive significant quality traffic to your site, which in turn can boost your subscriber numbers.

So, how does ReTweeting happen, anyway? Well, here are the 5 factors you need to take into account when trying to get your content to spread virally on Twitter.