Sem and seo dual drive: website keyword optimization1. Bottom logic of sem operating in concert with seoIn the area of digital marketing, sem (the marketing of search engines) and seo (the optimization of search engines) have always been complementary. According to the 100-degree white paper on the operation of chinese websites, the two-track strategy has resulted in an increase of 47 per cent in the rate of conversion of web traffic and 32 per c