Readability is all about making words and sentences easy to understand for people who are reading them. If a piece of writing is "readable," it means that someone can easily read and understand what the writer is saying.
One way to make writing more readable is to use simple words that most people know. For example, instead of saying "photovoltaic," which is a fancy word for solar panels, we can just say "solar panels" to make it easier to understand.
Another way to improve readability is to use short sentences and paragraphs. A long sentence can be confusing and hard to follow, especially for someone who is just learning to read. Short paragraphs help break up a lot of information into smaller, more digestible chunks.
Finally, good readability means using correct grammar and spelling. If you misspell words or use grammar that's hard to understand, it can make your writing harder to read. That's why it's important to proofread your work and make sure everything makes sense and looks right.
Overall, good readability means making writing easy to understand and enjoyable for everyone.