hey guys, we received this error when sending a query with a large number of excluded ids

RequestMalformed: Request failed with HTTP code 400 | Server said: Query string exceeds max allowed length of 4000. Use the /multi_search end-point for larger payloads

but i couldn't find any documentation on this. Is this because of using

get

/

post

in the query, or what is the reason for using multi_search for this?