If computers with good internet connection and power supply are available, online tutoring saves travelling time and other resources. It also make meeting of peoples at physically far places possible. Currently I can meet student on Skype or Zoom.
We can share screens, write and read each other works, share documents and images. While working on a topic I write text and equations and draw diagrams. I and student ask and answer each other questions. Everything I write are saved and sent to the student after the end of the session. It is almost the same as face to face meeting. A difference is student receives the works in a file instead of on papers. I also watch student's work on the problems if the student can write on computer. Home works can be sent by emails as well.
Have a look at sample document for Physics, and Math sheets to download.