Squiggly bits are the not particularly technical term for the special marking on printed music that indicate how a note should be played. It’s difficult to explain all of them so here’s a link.
https://royalfreemusicsociety.org.uk/MG/guide06.html
Self Bio
Herb Miller lives in Rowlands Castle with his wife and two cats. He's been collecting SBs for nearly half his lifetime. If you ask him why he’ll say Simply Because. His favourites to date are the short but sweet, palindromic sub bus, the sulphurous brewmasters Googlewhack and of course, seriously bonkers, simply brilliant and silly B. He fully expects his short booklet to become a shortlisted bestseller.
Buy the book from herbmiller.me/shop