Jetstar does provide the option to use a mobile boarding pass, allowing passengers to display their boarding pass on their smartphone or other mobile device. This means that printing your boarding pass is not strictly necessary if you prefer to check in online and utilize the mobile option. However, if you are more comfortable with a physical copy or if your specific travel situation requires it, you are welcome to print your boarding pass before arriving at the airport. It is advisable to check the current policies on Jetstar's website, as they may have specific guidelines depending on your route or travel class. Ultimately, the choice between a printed version and a mobile boarding pass is up to individual preference and convenience.