The Trim function removes and leading or trailing spaces in a string. A good use case is using Trim on any malformed data that may have been imported or inserted in a data extension with leading spaces. For example, if you are using a free form text field where the data is captured in a data extension, users who enter in information may inadvertently add spaces within the form.
%%[ set @response = Trim([Input]) ]%% This is your response: %%=v(@response)=%%,
|firstname.lastname@example.org||‘ Hello. ‘|
This is your response: Hello.
The Trim function removes any leading spaces and his is helpful if your data is not formatted correctly in the data extension.