Why did RadioShack shut down?

Could you explain to me the reasons behind RadioShack's closure? Was it due to financial difficulties, a decline in consumer interest, or perhaps a shift in the retail landscape? Did the rise of online shopping and e-commerce play a significant role in their downfall? Additionally, did RadioShack fail to adapt to changing market trends and consumer preferences, leading to their eventual shutdown? I'm curious to understand the various factors that contributed to this once-prominent retailer's demise.