: This indicates it is the "Web" version of the installer, which is typically a smaller initial file that downloads the full software components from Adobe's servers during the installation process.
This specific installer is used for (Standard or Pro) or older versions like Acrobat 2017/2020 . : This indicates it is the "Web" version
: For the latest Windows 64-bit versions. : This indicates it is the "Web" version
: It allows users to create, edit, sign, and protect PDF documents. : This indicates it is the "Web" version
: In some cases, users download these files from Adobe Community forums and find they are missing the .exe extension; simply renaming the extracted file to include .exe at the end can often fix the installer. Safe Sources for Download