A family of Microsoft word processing software products for creating web, email, and print documents.
This is not a simple matter because documents are designed to be independent.
I am a lawyer and often prepare many documents for the same client or case and need common information in them.
I use an Excel workbook to hold the information.
Each row is for a different case.
I then use Mail Merge to get that information into my documents.
Mail merge using an Excel spreadsheet - Word
This is not using it for mass mailing but more like a database. This method has worked for me for more than thirty years.
It requires that I insert the information into Excel before I can get it into the documents, but it only needs to be done once.
Anything else is going to involve macros and be harder to maintain, in my opinion.