Open Access (OA) is a publishing model for that allows readers to access research content for free. In the traditional subscription model, readers must pay to access journal articles or books, often through subscription by their library or by themselves.
However, the cost of publishing open access must be borne by someone, and the gold open access model involves payment of an article processing charge (APC) to have the work published open access on the publisher website. This can be a financial barrier for some, particularly those with no or limited funding.
There is a green open access model without additional charges, where the appropriate version of the publication is made available on an institutional repository, like InK.
The main benefit of open access is increased visibility of research which can lead to increased readership and higher citation rates.