If we don’t want Conclusion to have a chapter number next to it, we can add the {-} attribute.

More info

And here’s some other random info: the first paragraph after a chapter title or section head shouldn’t be indented, because indents are to tell the reader that you’re starting a new paragraph. Since that’s obvious after a chapter or section title, proper typesetting doesn’t add an indent there.

This paragraph, by contrast, will be indented as it should because it is not the first one after the ‘More info’ heading. All hail LaTeX. (If you’re reading the HTML version, you won’t see any indentation - have a look at the PDF version to understand what in the earth this section is babbling on about).