A:Answer Unlike analog cables, HDMI cables are transmitting digital signals (a series of ones and zeros)- basically a data stream. So the quality of the cable makes NO difference in quality of picture or sound. The signal will either work, or not work-- in other words the data stream will either get from one place to the other-or not-- it will not improve with a better cable. So if you have picture, you are good.
In the old analog days sales people would try and sell you an expensive cable (like Monster cables)- in the analog world this may have given you a slightly better picture or sound, but these (digital) days, it is silly to tell someone they will get better picture or sound with a better cable- it is a data stream that either connects or does not.
Some 4K signals specify a higher grade of cable- this is because there is a lot more data going down the cable than a HD signal-- but even in this example- you can find extremely cheap HDMI cables (like $5) on the internet that are rated for 4K signal.