Droid Serif is a serif font. It goes well with Roboto, Raleway, TeX Gyre Adventor, Lato, T Star, Neue Hans Kendrik, Futura PT, Poppins, Montserrat and Essays. If you're thinking about using Droid Serif then try Give 16px a shot for content.
People commonly tag it as portfolio, social, guide, ebook, agency, app, news, simple, food and design. You can get it from Adobe Fonts, Font Squirrel, Fonts.com, MyFonts, Typekit and Webtype.