Free for all: The core idea of open access is the basis of its key advantage, as articles will be freely available for anyone who wishes to read them. This is very important as the new information should always be available to the current researchers from which new findings can rise.
Increased readership: For authors, publishing open access rather than behind a paywall can help open up their research to a wider audience. In an era where the number of articles being published is skyrocketing, open access can help an article to be more discoverable online. And ultimately, an increased number of readers can convert into an increased number of citations for the author.