This is the 995th most frequent Spanish word.
trabajan
They work.
Here, 'trabajan' is indicative, third person plural, present tense, meaning 'they work' in a general, habitual, or current action context.
Ellos trabajan en una oficina todo el día.
They work in an office all day.
In this sentence, 'trabajan' points to an exclamation about the quality of action performed by 'the artisans', again in the present tense, third person plural.
¡Qué bien trabajan los artesanos!
How well the artisans work!
In this example, 'trabajan' is used in a relative clause with 'que', denoting a condition or action described for the subject 'the people', in present plural.