What does slots and SATA ports share the bandwidth mean?

What does slots and SATA ports share the bandwidth mean? sata slot Nowadays, it is widely used for magnetic hard drives and SSDs in format as well as for the slot In the case of SSDs, it is sata m2 slot SATA motherboard port Make note of which SATA port is being used as each one may need to be enabled within BIOS UEFI Step 8 Reinstall the computer

sata m2 slot 2_1 slot as originally it was showing In BIOS: My BIOS is up-to date AHCI mode is selected Table of my Motherboard According to below

sata slot SATA transfers data one bit at a time between a drive and its host, using a seven-pin data cable and 15-pin drive power connector cable The SATA cable results SATA Power Splitter: 3tfsQzC 4 Port SATA PCIe Card: 3h3Y0Fk