Indirect questions are questions that are embedded in a statement (e.g., “I wonder who will win this year;” “She asked Max where he was”).
Indirect questions often begin with an interrogative word (e.g., “where,” “when”), but they can also begin with “if” or “whether” (e.g., “My mom asked whether you want to stay for dinner”).
An indirect question is a special type of noun clause, often referred to as an interrogative clause. It is typically embedded within a declarative sentence, so it is not followed by a question mark. Additionally, the word order is the same as a declarative sentence (i.e., subject followed by verb).