It is the first paragraph that gives you the correct understanding.

The start of the Mark section (few lines before the lines you quote) is:
```
Jumping to a mark can be done in two ways:
1. With ` (backtick):
   The cursor is positioned at the specified location
   and the motion is exclusive.
2. With ' (single quote):
   The cursor is positioned on the first non-blank
   character in the line of the specified location and
   the motion is linewise.
```

Unfortunately, you also need to read the context to have the right understanding of the doc.