Vegemite is called a yeast extract because it’s a paste made out of brewers yeast.
It is black and salty so you only need a scrape, but it enhances the flavour of anything that needs salt.
I only ever eat whole grain bread and Vegemite is yummy with celery or avocado or even cheese.
There are some products that are close like Marmite, but Vegemite is the bomb. You either love it or you hate it. Aussie kids are raised on Vegemite.
Never had it, but heard enough about it I've considered shipping it in...