It is a genuine Honda component which is made for use with small engines that are commonly installed on lawn and garden equipment.
The spark plug uses the electricity generated by the ignition coil to create a spark, which ignites the air-fuel mixture in the combustion chamber. Symptoms of a failing or faulty spark plug include difficulty starting the engine or a complete failure to start.
To ensure the proper replacement procedure, refer to the owner's manual for your equipment.
Note, this high-quality spark plug is sold as an individual item.