1. Connects words and phrases
Conjunction
Connects words and phrases

2. Categories
Coordinating
Subordinating
Correlative
Conjunctive adverbs

3. Coordinating Conjunctions
FANBOYS
For (meaning because)
And
Nor
But Or
Yet So

4. Subordinating Join an adverb clause to the main clause
Common ones: after, although, as, because, before, even though, if, once, since, so that, though, unless, until, when, where, whereas, weather or not, while

5. Correlative Occur in pairs
Both/and, either/or, neither/nor, not only/but also, whether/or,

6. Conjunctive adverbs
Hybrid adverbs that pretend to be conjunctions because they join 2 sentences together with a semicolon
Accordingly, additionally, also, consequently, finally, furthermore, hence, however, in addition, in conclusion, in contrast, instead, likewise, meanwhile, moreover, nevertheless, nonetheless, otherwise, on the contrary, still then, therefore, thus