The Super-Simple Secret to Convincing People that your Offering's the Best
First things first, never say it's “the best.” Best is a boast. You lose credibility every time you use it.
Instead, focus on what makes your product, service or solution different. The value of that difference should be immediately apparent to your audience. If it’s not, you can explain why the difference matters, as long as you make your explanation believable.
If people recognize the importance and value of your offering’s differences, they will tell themselves that it’s the best. And what people tell themselves will always more convincing than anything you tell them.