This manual will not give you the following:
Step-by-step instructions when those instructions exist in other Yocto Project documentation: For example, the Yocto Project Software Development Kit (SDK) Developer's Guide manual contains detailed instructions on how to install an SDK, which is used to develop applications for target hardware.
Reference material: This type of material resides in an appropriate reference manual. For example, system variables are documented in the Yocto Project Reference Manual.
Detailed public information that is not specific to the Yocto Project: For example, exhaustive information on how to use Git is covered better through the Internet than in this manual.