When the exact words used by a speaker are reproduced, it is called direct speech.When the meaning of a speech is conveyed in the reporter's words, it is called indirect speech or reported speech.
The direct speech is always within inverted commas. And it is separated from the rest of the sentence usually by a comma. No inverted commas are used in indirect speech.
In the indirect speech, a conjunction, if necessary, is used to join the reported speech with the rest of the sentences.