The phrase "this article discusses" is correct and usable in written English. You can use it to introduce a discussion or exposition on a topic. For example: "This article discusses the significance of the 2020 presidential election in the United States and its implications for the future of democracy."
This article discusses Wilders' conviction.
This article discusses the hypotheses.
This article discusses the commercialization of medicine.
This article discusses the development of human behaviour.
This article discusses the tactics of land warfare.
This article discusses campaign-finance laws in the United States.
This article discusses the arthropods as a group.
This article discusses 4 diverse oral cases.
This article discusses an invariant formulation for transversely isotropic hyperelasticity.
This article discusses the current literature on norms.
This article discusses the fifth amendment privilege against self-incrimination.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.
Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com