Scenario A: You save, but nothing happens. Check your theme’s menu location. You might have assigned the menu to “Footer” instead of “Primary.” Themes are picky like that.
Scenario B: The dropdown appears but looks ugly. That’s a CSS issue. Don’t panic—Google “custom CSS WordPress dropdown” or ask your theme maker nicely.
Scenario C: You accidentally made everything a child of “Home.” Just drag them back. We’ve all been there. No judgment.