What does Isaiah 58:13 mean?

If you stop trampling on the Sabbath and doing whatever you want on My holy day, if you call the Sabbath a delight and honor it by not going your own way or seeking your own pleasure or talking idly, Isaiah 58:13 - Modern Text Bible

(God asks His people to respect the Sabbath, treating it as a special day to honor Him, not just another day for themselves.)