What benefit does using the pipe symbol "|" provide in Liquid?

Using the pipe symbol "|" in Liquid is associated with filters, which allow you to manipulate and change the output format of attributes effectively. When the pipe symbol is used, it enables specific transformations to be applied to a variable. For example, you can modify how data is displayed, such as converting strings to uppercase, formatting dates, or joining strings together in a specific format. This enhances the versatility of Liquid as a templating language and allows marketers to tailor content precisely to their audience's needs.

The other options relate to broader marketing goals but do not specifically pertain to the functionality of the pipe symbol in Liquid. Improved email open rates and increased user engagement are outcomes of effective marketing strategies, while reducing the number of messages sent is a tactical decision that is not directly influenced by the use of Liquid filters. Therefore, the correct response highlights the specific and practical application of the pipe symbol in formatting data output within Liquid templates.