I am wondering if posting a short blog post that quickly summarizes an article from an external website and adding a source link to the original article helps with SEO from SERPS, or is it useless, and full posts should always be written? E.g. mashable.com/2011/03/14/att-dsl-cap/ Any insight into this matter would be greatly appreciated. Also, the short summary post would be original content, and not just a copy and paste so to avoid duplicate content. Thanks Everyone!!!
Well, there is this new thing called "Social Bookmarking". It does exactly what you want. You should try it out.
IF you site is something like tech blog or news or bookmark type site, that you can do this. If you are trying to copy content for adsense or something similar, it is recommended to write original content your self.
summarizing means not copying it word by word and by giving credit to the original author is good.. So i think it can help, but you should also have something like a support on that one.