At the end of the day, getting a visa slot requires preparation and perseverance. A number of factors, such as changes in immigration laws, geopolitical events, and seasonal demand,one21 slots frequently affect the number of visa slots available. For instance, there is typically a spike in demand for student visas during specific seasons of the year, such as the summer, when many students are getting ready for fall admissions. Because of the increased competition, available slots may fill up quickly, so potential applicants may need to plan ahead.