Should long paragraphs be aligned justified or just left aligned? [duplicate]

1. Why is it better to justify align a paragraph?
2. When you do think left justification is preferable over justified alignment?
3. Which paragraph alignment is the most readable?

Why is it better to justify align a paragraph?

When you justify text in Word, you give your text straight edges on both sides of the paragraph. Justifying extends each line of your text to the left and right margins. Justifying text might make the last line of text in a paragraph considerably shorter than the other lines.

When you do think left justification is preferable over justified alignment?

When we want to scan and comprehend sentences quickly and efficiently then left Justification is preferable over justified alignment.

Which paragraph alignment is the most readable?

The left-aligned text results in much better content readability, so all books, articles & newspapers are written this way. The left-aligned text helps to avoid unnecessary eye jumps, making the whole copy much easier to follow.