Once a Dashboard looks as it's expected to, the developer has different choices of sharing the work. An upload to the Tableau Server is the most likely option. The end user might not look at the results on just a laptop; they could use a tablet or cellphone, too.
Exporting data to other devices
Exporting data to a mobile phone
While developing a Dashboard, the Tableau Creator has the option to take a look at Device Designer or Device Preview. You can find it here:
Please be aware that you can only use the sheets that are in the default layout of your Dashboard. Once you're in the Device Designer mode, select a Device type and you'll get choices of the most common Models:
A cellphone is usually designed...