What are hybrid and dedicated slots in smartphones?

It has microSDXC It means that the smartphone's memory cannot be expanded, but the storage can be expanded with

Find and buy phones with 2 SIM card slots and a dedicated slot for memory card in USA with E-Catalog ✓Prices of 1000 shops ✓ User reviews and ratings

cherry pop slot microSDXC Camera Main, Triple Camera: 108 MP, , PDAF + 2 MP+ MP , Dual LED Flash Features, Panorama, HDR, Video

pirate gold slot slot microSDXC Internal 64GB 3GB RAM, 128GB 4GB RAM, 128GB 6GB RAM eMMC MAIN CAMERA Single 8 MP, f, MP