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). https://doi.org/10.59225/n3zavd18.