Third angle projection is a common way of presenting information to others. In simple terms, a third angle projection has a plan at the top left of the page, directly below this the front elevation based on the plan above, and to the right of the front elevation a side view of the object.
In engineering drawings this is often the only drawing required by a manufacturer. For landscape and architectural projects this may not be the most suitable way to present your work. For example, your plan may be so large that you can only fit that plan on a page.