Did you know? The / is the default delimiter in sed, but it can be any character other than a backslash (/) or newline (\n) can be used instead of a slash (/) to delimit the regex and the replacement. This is the screenshot that explains this procedure step-by-step at the Linux or Unix CLI.
https://files.mastodon.social/media_attachments/files/110/903/060/781/320/496/original/fb56e608acbb9a14.png