What kind of spark plug is more reasonable?

Since repairs are all modular now, basically no one uses the "homespun method" of using a lighter to bake the spark plugs, or scraping off the carbon deposits with a knife. During repairs, they will directly replace them with new ones, a simple and clear way.
But some merchants will ask you to replace the spark plug with a better one. After replacing the spark plug, the acceleration will be stronger and the fuel consumption will be reduced. Please don't believe this nonsense, just tell them to replace it with the original one from the original car.
Although replacing the spark plugs will theoretically improve it, the improvement is not big. If you are not riding for competition, it does not mean much. If you are competing, you will definitely replace the entire ignition system.
According to the material, it is true that iridium spark plugs last longer in kilometers, but the price will rise accordingly, and the distance depends on the engine operating conditions, so choose the spark plug according to your own situation.