An adapter can bridge the gap when your ports don't match, but you have to check for weak links along the chain. Although USB-C cables are capable of high-speed data transfers and faster charging, the shift to them has created its own connectivity issues. If your laptop lacks an HDMI output and your display doesn't have a USB-C input, you might consider a USB-C to HDMI adapter for connecting your device to a TV, monitor or projector.
While these adapters can help with mismatched ports, they aren't always a perfect solution. They might fail to send high-resolution video or simply display a blank screen. These issues usually come down to the type of cables, ports and adapter you're using. Importantly, not all USB-C ports support video, with some only capable of charging your device and conducting data transfers. Moreover, the type of HDMI adapter and cable you use determines the maximum resolution and refresh rate of the output.
Think of these connections as a relay, with your ports, cables and adapters all running the same signal between your device and display. USB-C ports can only carry video outputs if they support Display Port Alternate Mode. The quality of this connection depends on the type of HDMI signal the cable and adapter are compatible with. Since its introduction in 2002, the HDMI standard has gone through several iterations. The highest-quality option widely available is HDMI 2.1, capable of carrying up to 48 Gbps bandwidth and delivering 8K resolution at 60Hz.
Source: Engadget · Summarized by HeadlinesBriefing