TY JOUR TI Application of Digital Marketing Innovation Technology to Improve Service Promotion Efficiency KW internet marketing KW website KW SEO optimization KW contextual advertising KW QR-code JO Bulletin of Kemerovo State University. Series: Political, Sociological and Economic sciences AU Podzorova, G.. AU Kirillova, V.E. AU Pleshkova, N.A. AU Gryaznova, N.L. PY 2019 IS 4 PB Kemerovo State University