What is the difference between present perfect tense and present perfect continuous tense?

Let’s break it down.
The difference between the present perfect and the present perfect continuous is that with the present perfect continuous the effect of the past action is obvious, tangible and continuous into the present.

When you see evidence and the action is still obvious use the present perfect continuous instead of the present perfect tense.

I will choose Present Perfect continuous to talk about my career.
I have been teaching since 2014. (period is emphasised)
Because it is a long period for me.

I can also use Present Perfect, (to emphasise the action or job I have done ever since ), but I chose not to.

I have taught since 2014.

If you still can’t get it, talk to a teacher near you.