Reading extends your vocabulary - learning new words will help your writing, speaking and listening skills at school, at home, in college and in whatever job you finally choose to do.
Reading teaches you new facts - example, you might never travel to Jupiter but if you read a book you can learn many things about it, see pictures of it and further develop your knowledge and intelligence.
Reading develops your imagination - this will help you to express yourself especially in your writing.
Reading is great fun and relaxing - while using computers, tablets, phones etc is something we all like to do, it's healthy for our eyes and brains to have a break from them. So books can be enjoyable diversions from our IT and a great way to chill out too.
Reading is a fantastic social activity - when my parents used to read to me at night, it was a wonderful way for me to spend some memorable time with them, and a relaxing activity before shutting my eyes before going to sleep. Older children can also form stronger bonds with their younger siblings by reading to them.
Reading can be free - It's great to buy a book and keep it forever, but if you join a library you can take out many books at any one time and it will cost you absolutely nothing! There will be comics, magazines, graphic novels etc and if your eyes are tired or you find reading from a page challenging, you can borrow audio books - these are also completely free!