The incremental export is the standard export procedure for websites with a lot of traffic. By means of jobs configured in the Content Management Server, updated content is regularly transferred to the live server. There it is exported by the Template Engine.
One advantage of the incremental export is its better performance compared to the static export. This is because not the complete folder hierarchy but only files that have been modified need to be exported. Another advantage is that the live server is always up-to-date.