You can define your own variables using Liquid and assign desired values to them. There are no data types in place for you to worry about. These can be used to provide simple, readable names that can be easily comprehended when come across later.
Example:
{% assign helpdesk = 'Freshdesk' %}
{{ helpdesk }}
The statement above performs a straightforward assignment that displays “Freshdesk”. Yes - that’s about as creative as we’re willing to get on this one. You can also assign variables to be boolean, to be used with conditional statements later.