Will showing recent posts on my homepage cause a duplicate content issue?

Matt's answer:

MATT CUTTS: Today’s question comes from David in the United Kingdom. David asks Hi, I’m noticing more people are using the API for their blog to pull the latest X posts up to the front page of their website. This gives a refreshing feel to the home page, but is this considered duplicate? If you do something like this, my main advice would be not to put the entire blog post on the home page. But for example, if you have a paragraph, something that’s sort of a teaser, and then a link to the actual location of your article. That’s a pretty good way to do it. If you go to the front page of my blog, I’ll have a whole bunch of different stuff there. But then they’re always links to go to the original article for where it’s located on my blog. So as long as you don’t have a completely duplicate blog post where the whole thing is completely there it shouldn’t be an issue. But even then, Google for the most part is able to disambiguate and say, oh this is a page that’s refreshing pretty often. We have a pretty good idea that the actual content is linked to on these following pages. So those are just some best practices. I would tend to just show excerpts rather than the full blog post, if you’re doing it on a completely separate page. But it is very common for people to have their main blog and have the full text of their posts right there on the main page. And that works completely fine. So those are very similar situations. And in general, people haven’t reported huge problems with that. So I think that that’s perfectly fine to do.

by Matt Cutts - Google's Head of Search Quality Team

Original video: