I can only answer for my little hole in Victoria, Australia as that's where I'm from. I'm 100% sure the answers will be different from people that live elsewhere.
Jelly for us is (I think?) what Americans would call Jello. Gelatine, sugar (and that's basically it), whack it in the fridge for a few hours and it goes awesome and wobby. Not made for toast. It's a dessert, typically.
Jam is... not citrus (that's marmalade). It's a preserve that goes amazingly on croissants with a smidge of butter. Strawberry and raspberry are the most common here.
Marmalade for us is similar to jam, but citrus only. So you won't normally find orange jam, for example; you'll find orange marmalade. Never been a fan personally, but I'm also not a huge citrus fan in general.
Spreads would be your toast toppings like peanut butter, Nutella, Vegemite (for those uninitiated, don't pile it on. You'll die of sodium o******e 😉), etc. Essentially stuff that doesn't fall under the previous two umbrellas.
Jelly for us is (I think?) what Americans would call Jello. Gelatine, sugar (and that's basically it), whack it in the fridge for a few hours and it goes awesome and wobby. Not made for toast. It's a dessert, typically.
Jam is... not citrus (that's marmalade). It's a preserve that goes amazingly on croissants with a smidge of butter. Strawberry and raspberry are the most common here.
Marmalade for us is similar to jam, but citrus only. So you won't normally find orange jam, for example; you'll find orange marmalade. Never been a fan personally, but I'm also not a huge citrus fan in general.
Spreads would be your toast toppings like peanut butter, Nutella, Vegemite (for those uninitiated, don't pile it on. You'll die of sodium o******e 😉), etc. Essentially stuff that doesn't fall under the previous two umbrellas.