TL;DR
The number of Visitors or Sessions by Device Type metric tells you the type of devices used by visitors to your website in a specific time range.
This information helps you optimize your website design, experience, content, and optimize your content for advertising campaigns.
What is the device type usage in your analytics dashboard?
Device type in your analytics refers to the visitors who use a mobile phone, desktop, or tablet. Some analytics tools display the device brand, as well.
As you might know by now, visitors to a website come from all around the globe and from all sorts of devices. While some industries are more keen to have visitors using a specific device in a high percentage, sometimes you have to declutter your statistics and see what type of device do people use when they visit your site.
Why is the Device Usage essential for you and your site?
Knowing the devices your website is accessed from helps you optimize your design and content for the devices that your customers use and display a consistent experience to your customers no matter the device they use. This means a higher chance to convert your visitor into a customer.