I am SO glad you asked this. Meditation is amazing for people who struggle with attention. Essentially what you are doing in meditation is training the brain to be able to stay focused on one thing and that, just like with any other muscle, makes your brain better at this over time. The kind of meditation that is the most effective for helping with focus and things like ADD is called "Focused Attention." In this kind of meditation you focus on an object of focus and dont let you mind drift away. In Chorus we do TONS of focused attention techniques. Essentially what you want is a "concrete object of attention" - so something like a mantra (a phrase you repeat over and over) would be more concrete than say, just feeling your breath. We designed Chorus to give people super concrete objects to focus on so its easier to get into that meditative state.
Since starting to meditate myself I have become way better at reading speed, comprehension and overall focus has improved dramatically.
Here is a study that talks about it:
https://journals.sagepub.com/doi/abs/10.1177/108705470730850...