I notice you're asking for a "story covering index of Acrobat Pro." It sounds like you might be looking for a narrative or explanatory guide about the in Adobe Acrobat Pro — specifically how to create, manage, or use search indexes for PDF documents.
Password protection, redaction of sensitive info, and preflight for ISO standards (PDF/A, PDF/X). index of acrobat pro
For most users, the Creative Cloud desktop app is the intended delivery method. It manages updates, ensures version compatibility, and handles licensing automatically. I notice you're asking for a "story covering
It is important to distinguish the "Index" feature from a Table of Contents (TOC). Acrobat Index: It manages updates
Pro users can also create a unified index for a collection of many PDFs (a "Catalog") to search across all of them at once. 2. Visible Index / Table of Contents
If Acrobat Pro feels sluggish even after indexing, ensure your software is updated. You can also try disabling Enhanced Security Edit > Preferences > Security (Enhanced)