Commas, which one is proper?
In proper use of the Chinese language, you're talking about the difference between the true comma 逗號 「，」 and the enumeration comma 頓號 「、」.

The difference between the two can be illustrated in a sentence from the Chinese Wikipedia article on 頓號:


  分隔同類的並列的事，通常是單字、詞語或短句，當中的停頓較逗號短。
  
  (Enumeration commas are) used when separating similar items consecutively, such as single characters, words, or short sentences/phrases, where the pause is shorter than that given by the True Comma.


The list begins with the word 單字, continues on with 詞語, then finishes with 短句, after which the true comma is used to create a pause between the previous part of the sentence and the next part.



Note: Very rarely will you see enumeration commas everywhere and true commas not used at all. In this case, you're most likely looking at a Japanese rendition of a Classical Chinese text, because in the Japanese language they use 「、」 for everything.