I have a shapefile that did not initially have a projection. I used Define Projection tool to give it projection of Web Mercator.
Then I saw that the extents are as follows:
Top: 56.610778 m
Bottom: 51.286333 m
Left: -6.744222 m
Right: 2.604972 m
This does not look right to me. How would I be able to fix it?