“It’s the best” is a phrase used to express strong approval or satisfaction. It can be used to describe anything from a person’s appearance to a product’s quality. When used in a review or recommendation, “it’s the best” can be particularly persuasive.
There are many reasons why someone might say “it’s the best.” Perhaps they have had a particularly positive experience with the subject of their praise. Or, they may be comparing it to other similar things and found it to be superior. Whatever the reason, “it’s the best” is a phrase that conveys a high level of satisfaction.