What specific type of user-defined variable allows you to translate multiple different values from one variable to another in GTM?

The Lookup Table variable in Google Tag Manager (GTM) allows you to translate multiple different values from one variable to another. A Lookup Table works by comparing the input value from a specified variable to a list of values you define in the table. When a match is found, the Lookup Table variable outputs the corresponding value you associated with that input. If no match is found, you can specify a default value to output. For example, imagine you have a website that uses different codes for countries (e.g., 'US', 'CA', 'UK') and you want to translate these into the full country names for reporting in Google Analytics. You can create a Lookup Table variable that takes the country code as input. In the table, you would define 'US' as the input and 'United States' as the output, 'CA' as the input and 'Canada' as the output, and 'UK' as the input and 'United Kingdom' as the output. Then, in your Google Analytics tag, you would use the Lookup Table variable to dynamically populate the country dimension with the full country name based on the country code. If a country code not listed in the table is encountered (e.g., 'DE'), the Lookup Table can be configured to output a default value like 'Other' or 'Unknown'. This makes the Lookup Table an efficient way to handle multiple value translations within GTM without needing to write custom JavaScript code.