How to organize the filling of positions in a large online store?

Question

Online shopping

Our company has a fairly large online electronics store (more than 20,000) products in the nomenclature. We were puzzled by the issue of filling out product cards. How it happens with us now:
There is a content manager, he has a nomenclature. He sees the position and googles descriptions and pictures. We also have filters (sorting positions by criteria) that he already fills in manually. This approach is very time-consuming and there are constant mistakes (considering the volumes) and we understand more and more that this cannot continue.
Who can tell how this process is done in similar large online stores, so that we at least know what to read.
Many thanks in advance for your help!

Answer 1

- add X copywriters
- steal description from someone else's store