Now that your child has started understanding words, he will try reading words written on things he will be using in his daily life. Like the chocolate he's eating, he will try and read its name or the book title you might be reading.
What you need to know
He might not read it correct at once but at least he's trying. Make your child familiar with words which he will come across in day to day life like your name, his name, school name, etc. So that he gets acquainted to them and reads properly. Help him identify new words, start with simple ones to improvise his word recognition ability.