Acrobat can search the index much faster than it can search the document.
Users search PDFs with embedded indexes exactly as they search those without embedded indexes; no extra steps are required.
With December 2018 release of Acrobat DC and Acrobat Reader DC, the embedded index in the PDF is no longer used for searching.
Use to exclude specific words (500 maximum) from the index search results. Excluding words can make the index 10% to 15% smaller.
A stop word can contain up to 128 characters and is case sensitive.
If you still want to enable the index for searching, see How to enable the embedded index in a PDF for searching.
and create a unified index for that entire collection of documents.
Automatic update of the embedded and linked objects is extremely powerful feature of Microsoft Word, but it could be boring for a large document.
Locking a link prevents the object from being updated by the original application file, such as an Excel spreadsheet file.
With manual links, Word updates the links only when you decide to update them. The simplest is to position the cursor somewhere in the linked object and then press F9.