It’s html code
no idea why it shows, an eBay error somewhere
no you don’t have to delete it, your listing description will show as normal on the live listing
you can highlight it all and delete and do your description again if it’s not too long
or you can use the cursor and add bits here and there or delete bits which is a pain if you’re not sure what the codes mean or where to type
Annoying
eta
if when revising you chose use AI description it populates it with normal looking text
which is easier to work with
just click anywhere in the description to bring up the option