PT Serif is a serif font. It goes well with Source Sans Pro, PT Sans, Proxima Nova, Alternate Gothic No. 2 D, Poppins, Montserrat, Times and Abril. If you're thinking about using PT Serif then try Give 18px a shot for content.
People commonly tag it as agency, quote, magazine, food, elegant, decorative, design, portfolio, article and ux. You can get it from Font Squirrel, Fontdeck, Fonts.com, Fontshop, Fontspring, Google Web Fonts, MyFonts, Typekit and YouWorkForThem.