In Streetspotr language, a Spot means a small job or task. Each job has a detailed description of what is required and if you accept a Spot you agree to complete the job. This Spot is now reserved for you for 12 hours, if not indicated differently. This means, the Spot is not visible for other Streetspotrs.
There are location-based and regional Spots. For this, see: "What are regionial Spots?"