Vim allows users to define their own tags to facilitate jumping (jump from one function to another, and then jump back);
1. Set the mark:
Use the m command to set the mark. For example, in the normal mode, press ms to set a mark named s.
2. Jump to the mark
Connect, in normal mode, press's, it will jump to the position marked a (it is recommended to move the cursor and then execute this command, for example, execute the G command to jump to the end of the text)
3. View the mark
When a lot of marks are set, you may not remember the marks you set, then you can enter :marks to see which marks are set