ASPEK DIGITALISASI DALAM PENINGKATAN MARKETING PADA PERUSAHAAN JASA ANGKUTAN LAUT (STUDI KASUS PT. YICHENG LOGISTICS- JAKARTA): Aspects Of Digitalization In Improving Marketing In Sea Transport Services Companies (Case Study Pt. Yicheng Logistics- Jakarta). matemar. 2024;1(2). doi:10.59225/n3zavd18