As your child grows and develops, so does their ability to communicate with the world around them.
Around age 3-4, your child should be able to group objects, such as foods or clothes, and use most speech sounds correctly, though they may still distort some of the more difficult sounds such as r, th, and dz. Your child should also be using consonants in the beginning, middle, and ends of words and strangers should be able to understand 90% of what they say.
If you are concerned that your child is not meeting these speech and language milestones, it may be helpful to consult with a speech therapist. A speech therapist can assess your child's speech and language skills and provide targeted interventions to help your child develop the skills they need to communicate effectively.