Filters are a feature of the Nunjucks templating language that allow you to modify variables. Separated by a pipe symbol (|), they can be chained together, with the output of one filter passed on to the next.
For example, {{ "<p>GOV.UK</p>" | striptags | lower }} will remove the HTML tags, lower-case the remaining string and output gov.uk.
GOV.UK Prototype Filters provides an additional collection of filters which can be used to transform:
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