Usually a journalism degree is needed, but with newspapers and magazines having smaller and smaller readerships, there are just not a lot of editing jobs. Huge websites that review products often have paid editors, but again, lots of people want these jobs (who wouldn't want to get paid to talk about their opinion about stuff?) and even some huge websites have volunteer editors and reviewers.... eh em.....from what I remember about friends who once majored in Journalism, what we're doing here is a GOOD gig in reviewing. We do get paid and we have a lot of freedom and we even get the chance to do editing. I think Eden is one of the best of the bunch, for most writers who don't have a lot of published pieces and pays quite well. Who else pays you in sex toys and lingerie?
Book editing is a highly sought after job, and almost always requires an advanced English degree, Literature Degree or Journalism Degree. If you love it, certainly seek out information from local Universities, but also do some research to see how many jobs there are out there (most are in New York, LA and Chicago and Atlanta, publishing hubs) compared to the number of graduates per year and people already with these degrees. Sadly, I know a number of English majors and Journalism Majors who simply can't find jobs in their field. Why? The Internet. LOTS of free, non-paid literature and reviews.
