The tax free weekend is the Summer weekend where school items, clothing and computers do not have any sales tax added onto them (saving people a decent chunk of money). This applies to school items and clothing less than $100 in value each item and computers less than $1,500 in value. The Smoky Mountains are a popular destination place during this time as many are able to find great school supplies, clothes and computers here during that time.
For more details about tax free weekend, go to https://www.tn.gov/revenue/article/sales-tax-holiday.