Best Buy is only the latest retailer to jump on the voice-shopping trend, too. Walmart and Target both offer home shopping via Google Assistant. This isn't the first time Amazon has allowed a competitor into its garden, either. Spotify and Pandora live easily next to Amazon's own music service on its connected smart speakers, as do competing on-demand video services.
Once you add the Best Buy skill to your Alexa-powered device and say "talk to Best Buy," Amazon's voice assistant will offer to link your Best Buy account to your Alexa app, and will also request that you enable your location. You can ask about the Deal of the Day, too, and Alexa will list the current deals and ask if you want to purchase them.
Update: A Best Buy spokesperson reached out to Engadget to note that the retailer also has special sections for Google Home devices in the same 700 stores that it sells Alexa devices. Best Buy also has voice assistant shopping with Google Home in Canada.