The application is best suited for intermediate and advanced users who prefer to work on the commandline. It is very similar to vim but got written intirely in C++. You can easily select multiple parts of your text. kakoune makes use of the client/server architecture so you can modify the same file from many instances of kakoune.
Help and assistance
For vim users who want to give kakoune a try it is recommended to read their vim to kakoune documentation.