Compost is a term generally used to describe organic garden material
It is a mixture of green and brown plant based materials. Basically, the green materials are living leaves, flowers which you may have trimmed off your garden plants. Whilst the brown materials are dead, fallen leaves in autumn, twigs and so on.
Garden compost is created in the composting bin. Of which there are many types, from the ubiquitous black recycled plastic sort to wooden beehive look-a-likes. The choice is partly decorative and partly dependant on the type of composting which you wish to carry out.
As a gardening term, it can also mean soil with added, organic matter and grit. For example, a particular custom mix to use when potting up seedlings.
For more on compost types and composting methods, have a look at the blogs below: –