I'm Korean so let me explain about the company.
Daum KaKao is combined company of Daum communications & KaKao.
Daum Communications is an internet company, mainly focused on internet portal service like Yahoo!. (It is second largest portal in Korea, the first is Naver)
KaKao made a KaKaoTalk, which is dominant messaging app in South Korea.
Naver, which is the number one internet company in Korea has both of internet portal and messaging app (LINE, which is dominant messaging app in Japan and Taiwan) so Daum and KaKao are merged in 2014.
Daum KaKao now focusing on mobile service since it has dominant messaging app in Korea. The reason why they acquired Path is they want to enter Southeast Asia market, which Naver and Tencent WeChat already have largest portion. (Daum KaKao said that they acquired Path because of Indonesian market. Path has many users in Indonesia)