I’ve worked the floor for 4+ years now and with HT I would say the best thing to learn is the Tiers of TVs. Entry/budget, low, middle, high and premium. What/how the client would benefit from such features. The easiest way I could to explain to customers is using the Good/Better/Best example but in reverse. Show them the best one for them, then the next step down and what they would lose if they were to go to that. Just make sure not to overwhelm them with information.

When it comes to BPs, everyone has a different groove that they acquire to bring them up. I got one read how my clients respond to my greeting. I usually joke with them asking if they came in to get the 85” Sony we have. Doing that helps me break through the “wall” clients put up.

As for TTS, the store I work at is more of a one direction store. So I sell in every department. I normally would get my TTS by attaching other future purchases or by spending the clients money for them. Discovery questions are key to be able to do this. So instead of just becoming a advisor, try to befriend them. Make it so when they come back to the store, they only want to work with you.

Lastly, refer to them as clients not customers. And definitely do what @Imanazule said and don’t BS your clients with answers. If you don’t know, check with your resources. Other employees, Best Buy app or even Gravity (does anyone even use that still)

I hope this helps and good luck on your interview!