Ordinals are sometimes formatted as superscripts: 1st, 2nd, 3rd, 4th.
They’re much easier to read like this: 1st, 2nd, 3rd, and 4th.
Some bad typographic habits can be blamed on typewriters. This one falls on Microsoft’s shoulders. Just because Microsoft Word thinks ordinals should be superscripted is no excuse for doing it this way.
Superscripted ordinals are too small to read at copy sizes, which defeats their purpose and, unless extra care is taken (read: extra time and expense to adjust the font size, baseline alignment and position, and alter the weight so it matches the surrounding text), they also mess up the leading between lines, making them an unsightly distraction.