After the website is developed, do you need to write processes and ideas?

After the website is developed, I did a small test website on whether to write a process or train of thought, and asked me to write a process or train of thought. I don't know what to write. do you want to write instructions. What should I do after developing and writing the program ?, If it is for the user, you need to write the "User Manual ". For users, there is basically nothing to write. Do you need to write processes and ideas after the most website is developed?
I made a small test website and asked me to write the process and ideas.

I don't know what to write. do you want to write instructions. What should I do after I write the program?



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If it is for the user, you need to write the "User Manual ".
For users, there is basically nothing to write. Each module can be described at most.

What you wrote is not the "design document" of the website.
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