Learn how paylines differ from clusters, which symbols wilds can replace, and...
https://varimail.com/articles/does-a-nearly-full-meter-mean-the-bonus-is-about-to-hit/
Learn how paylines differ from clusters, which symbols wilds can replace, and how scatters start bonus rounds. The guide also explains why a rising meter only tracks progress, not a promised win, so you can read slot rules without guessing.