A true Open Access publication is freely available immediately upon publication for reading and reuse. However, there are many variations of open access.
A consistent area of confusion for scholars is the conflation of journal quality with the business model of a publication. An author can choose to publish wherever they like and still have the potential to make their work open access. Alternatively, an author could publish in a journal that operates under a fully OA model (all works are OA) or a hybrid journal model - where both subscriptions and OA fees are collected and not all works are OA.
The resources given in this section can help authors understand the differences between types of open access.