Sophie Amundsen was often dissatisfied with her appearance. She was frequently told that she had beautiful almond-shaped eyes, but that was probably just something people said because her nose was too small and her mouth was a bit too big.
This is a paragraph of Sophie`s world , and I didnt know how to understand the part " but that was probably just something people said "

Question

Sophie Amundsen was often dissatisfied with her appearance. She was frequently told that she had beautiful almond-shaped eyes, but that was probably just something people said because her nose was too small and her mouth was a bit too big. 
This is a paragraph of Sophie`s world , and I didnt know how to  understand the part " but that was probably just something people said "

Answer

Hi there. It means people only said it to be nice/polite to her, when actually they were busier noticing her nose and mouth rather than her eyes