Using a single product focus email means you only talk about one item, which stops your reader from getting confused about what to do next. You should pick one product and spend the whole email explaining just one main benefit it gives the user, making it sound like the perfect answer to a known issue they have. Make sure the design is clean, with the product picture and the "Buy Now" button standing out clearly. This keeps the message strong and directs all attention to that one purchase decision. When you focus on just one thing, do you think it is better to talk about the price or the main benefit first?