Define CRO

Marketing
1

Can anyone tell me what is CRO

2

https://www.google.co.uk/search?q=CRO&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=rcs#client=firefox-a&hs=SRg&rls=org.mozilla:en-US%3Aofficial&channel=rcs&sclient=psy-ab&q=CRO+marketing&oq=CRO+marketing&gs_l=serp.3..0l3j0i22i30.4754.7156.0.7272.14.6.3.4.4.0.136.628.3j3.6.0...0.0...1c.1.17.psy-ab.polXpV4WGao&pbx=1&bav=on.2,or.r_qf.&bvm=bv.48293060,d.ZGU&fp=1fcd42495e594388&biw=1680&bih=968

This is far too vague a question, as a simple search would have sufficed to answer the question. Please search (both the forums and via your favorite search engine), and if you’ve still got SPECIFIC questions, please feel free to repost.