What is the difference between conjunctions and subordinating conjunctions

A Conjunction is a word which joins together sentences, and sometimes words.

Instances of the same are: and, but, because, etc.

Subordinating conjunction is a type of conjunction which joins a clause to another on which it depends for its full meaning.

Instances of the same are:

• Will you wait till I return?

• I do not know how you will arrive?

• Make hay while the sun shines.

• I know not why he left us.