What specific characteristic defines jobs like teaching English as a Second Language (ESL) that imposes significant limitations on a digital nomad's mobility?
Answer
It requires synchronous time, meaning the tutor must be available when the student is awake, dictated by student schedules.
The text classifies ESL tutoring as a role with 'Very High' time zone constraints and a 'Synchronous' work style. Synchronous work mandates being available during specific, predetermined hours to interact live with students or clients. For ESL, this means the instructor's schedule must align with their student population's waking hours, which can frequently force the nomad to work very early mornings or late nights, regardless of their personal preference or the local time zone they happen to be visiting. This requirement restricts the freedom to fully embrace unpredictable travel days.

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