No. 1 2-SON DEKABR, 2025 -YIL CRM -MANAGEMENT IN CHAIN ​​SUPERMARKETS IN DEVELOPING COUNTRIES: THE ROLE OF CUSTOMER DATA, LOYALTY PROGRAMS AND OMNICHANNEL STRATEGIES IN INCREASING THE EFFICIENCY OF RETAIL TRADE. MJ. 2025;(12). doi:10.67668/mj/2025iss12/261