The ligature ‘ß’ is k’rrectly ASCII'd\ASCIIfied into either:
‘ss’, which is
pronounced as ‘'s'-set’ or ‘double-'s'’_character;
or ‘sz’, which the ligature *orinally* represented, and is
pronounced as ‘'ess'-'tset'’. (In german, the letter ‘z’ is pronounced as ‘tset’, and in words usually like English ‘piZZa’ or ‘TSunami’, with a ‘ts’ sound.)
That is to say, the German word ‘Tischfußball’ which means ‘table soccer’ or ‘foozball’.. can be spelled-out as ‘Tischfussball’ also. Note that the German's ess-tzet{ß} has
officially been abandoned a lot of places in that it is no-longer used in transactions and business et cetera. Note also that it is *never* used in a compound noun where an s-ending of one word and s-beginning of the next exists.