This website is a case I optimized. The main parts of optimization are the title and tags. Its title is set to "used road roller, used road roller price, China (Shanghai) Road Construction Engineering Machinery Co., Ltd." Its description tag is "Our company supplies various models of used road rollers all year round, providing a wide range of new and old customers with the lowest used road roller prices! Brands include Hitachi used road rollers, Komatsu used road rollers, Sumitomo used road rollers, Caterpillar used road rollers and more. Friends from all sectors of society are welcome to call for consultation and negotiation." Its keywords are "used road roller, used road roller price".