Indents are used to position the paragraph with margins or within the columns in a table.
You can tweak your margins further depending on what you’re writing. For example, you can create a “first line indent.” This is more of an old school style wherein the first line of each paragraph will be indented.
This is a more traditional way of formatting paragraphs, allowing you to denote where new paragraphs begin in a single-spaced document. Today, text is usually formatted in a block style with a double space between paragraphs.
A second line, or “hanging indent,” will automatically indent every line after the first one. One confusing part with indents is you can move them outside of the margin, which is counterintuitive unless you consider that a printer can print outside the margins, and is limited only by the width of the paper.
There’s not a whole lot to master when it comes to tabs, margins, and indents. That said, it pays to understand how they work so you can get more precise results in your documents. And it gives you a better understanding of why a documents looks the way it does or more importantly, why it may not look the way you want it to look.