Function-as-a-Service (FaaS) is a term used in the fields of digital transformation, automation and cloud technologies. It refers to a modern method in which small programme components, known as functions, are provided in the cloud and only executed when they are actually needed.
In contrast to traditional applications, FaaS does not run any permanent programmes. Instead, individual tasks - such as processing a photo or sending an email - are triggered automatically as soon as they are needed. The company or team does not have to worry about servers, maintenance or capacity. Only the actual usage is billed, which saves costs and remains flexible.
A practical example: An online shop uses function-as-a-service to create a customised invoice as a PDF for each order and send it by email. As soon as an order is received, this function starts automatically, processes everything quickly and then goes back to "sleep". For companies, FaaS means less effort, lower IT costs and quick adaptations to new requirements without lengthy IT projects.
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