In the process of using vim, vim will set some flags by itself, mainly as follows:
1. '(single quotation mark): the cursor position before this jump, then in normal mode you can use'' (press two single quotation marks consecutively) to jump to the previous position, which is very convenient
2. "(double quotation mark): the position of the cursor at the last edit (vim will automatically set this mark every time you edit)
3. [: The starting position of the last modification
4.]: The end position of the last modification
These marks are still very memorable,