This Help Resource follows on from the previous Action Designer Help Resources, the Overview, the Open Form and the Open Form / New Object which we recommend you research before continuing with this Help Resource. Much of the configuration of Action Designer is common for each Action Type.
The Open URL action allows the user to open a URL in either a new tab or the same tab. It also allows a field to be passed into the URL using the ObjectId/LanguageId/VersionId/RecordUID tags with [! and !] either side of the tag.
In the image you can see that we have used the ObjectId tag, we can bind any property to that tag and it will be inserted into the URL when triggered.