Walmart’s Black Friday sale is officially underway, and one of this year’s strongest categories is vacuum cleaners.

Black Friday is the most anticipated shopping event of the year — and for good reason.

Today, the best of the best include up to 60% off activewear at Lululemon, up to 60% off mattresses at DreamCloud, up to 50% off sneakers at Foot Locker (including select Jordan styles), up to 50% off...