There are four types of alignment in MS Word: left alignment, right alignment, center alignment, and justified alignment.

1. Left Alignment:
- In left alignment, the text is aligned to the left margin, creating a smooth and even left edge.
- This is the default alignment for most documents and is commonly used for body text and headings.

2. Right Alignment:
- In right alignment, the text is aligned to the right margin, creating a smooth and even right edge.
- This alignment is commonly used for aligning dates, addresses, and numbers in tables or columns.

3. Center Alignment:
- In center alignment, the text is aligned to the center of the page or column, creating an even distribution on both sides.
- This alignment is often used for headings, titles, and centered text blocks.

4. Justified Alignment:
- In justified alignment, the text is aligned to both the left and right margins, creating a straight edge on both sides.
- This alignment evenly spaces the words and stretches or compresses the letters and words to fill the line.
- Justified alignment is commonly used in newspapers, magazines, and professional documents to create a clean and polished look.

These four types of alignment provide flexibility in formatting and presenting text in MS Word. Depending on the content and layout requirements, different alignments can be applied to enhance readability and visual appeal.