Encoder-Decoder URL: In Advertising for the video ad tags, the VAST is mostly required and converted into Encoded format, which means some of the characters are converted into encoded format so that it will be easier to read demand side platform.
Here is simple tool Which will help you understand if you came across any encoded URL/Ad calls from the chrome console or you want to add the site url into Encoded format on the site.
This simple tool is collected from the https://meyerweb.com/eric/tools/dencoder/
Tags: Adops Tool