The single biggest surprise in IELTS Listening isn't hard vocabulary — it's speed. The recordings play once, at natural pace, and native speakers link words together: "a lot of" becomes "a lotta", "did you" becomes "didja", the /t/ and /d/ at the ends of words vanish into the next sound.
This matters most in Section 1 and Section 3, where you're catching names, numbers and specific details in a flowing conversation. Miss the boundary between two words and you write down the wrong answer — even though you "knew" every word on paper.
The fix is targeted exposure, not more textbook audio. Practise with short, real-speed clips where you deliberately listen for the reductions: the linking, the dropped endings, the weak function words (of, to, for, and). First slowed down so you can hear the join, then at full speed until it stops surprising you.
That's the core of what Lisenia's Catch Fast Speech unit trains — one decoding skill at a time, on IELTS-style material. Take the free skill check and it'll show you exactly how your connected-speech decoding scores today.