Dummy pronoun
From Teflpedia
A dummy pronoun (/dʌmi prəʊnaʊn/) is a pronoun used even though it has little-to-no substantive meaning, in order to follow syntax rules.[1]
The two main dummy pronouns used in English are it and there (and here)
For example
- It's sunny today
- It seems that the meeting was cancelled.
Unfortunately, this is one of these areas that grammarians like to argue over.