Does my site look horrible on your end?

you have 35 errors and 2 warnings. https://validator.w3.org/check?verbose=1&uri=http%3A%2F%2Fbrittanywigand.com%2F

if you need some help let me know @joshwhite

Holy moly! Are those errors and warnings what’s causing my site to look messed up on other people’s computers?

& I fixed my site’s CSS today using that validator site. But I don’t really understand the errors and warnings… I don’t know what it wants me to do. Can you help me Josh? Thanks. <3