What does this mean?

[Love-to-shop]

Ok, so I am a little confused here. A lot on Blogs, and a few posts, I have been seeing this: (sp?) Does anyone know what that means? I am confused. Please Help!

[CrazyCutie129]

(sp?) = spelling
someone isn't sure how to spell a word

[Love-to-shop]

Ok, thanks.

[Ashlie]

Sp? Is Spelling.
Tara beat me to it.

[iloveadriane]

sp means spelling and you should change the colour of your words because I could barely read the words