Harvard referencing is a generic term used to refer to author-date referencing. Whilst Harvard referencing is the most commonly used approach in the university, there are exceptions, so please check with your course.
The library has a Harvard Referencing Quick Guide, which gives examples of commonly used sources.
With the Harvard approach, the in-text reference uses the author and date of publication to refer the reader to a list of references arranged alphabetically by author. There is an example below of an in-text reference and an entry in a list of references. You will also find a sample text and reference list using Harvard on Cite Them Right.
In-text reference
Pears and Shields (2022) suggest x
Entry in the list of references
Pears, R. and Shields, G. (2022) Cite them right: the essential guide to referencing, 12th ed. London: Macmillan.
The list of references is not included in the word count, but in-text references are. Therefore, the use of Harvard referencing does increase your word count compared to numeric referencing styles. This is not normally significant unless an excessive number of references are used. You should check whether there is any allowance for the word count - allowing up to ten per cent above the set amount is quite common.