Gaming hardware companies create headsets, mice, keyboards, microphones, monitors, and any other peripherals used for gaming and streaming. These companies are massive and are absolutely staples in the gaming community.
People often create allegiances to certain brands the same way someone might have an affinity towards a certain brand of car. The fanbases of these companies can be fiercely loyal but savvy consumers will take reviews and influencer suggestions into consideration before making a hardware purchase as performance is key with this category.