Explanation:

The word Brahman is used for God and also for those non-God items, which are the greatest among their categories. Hence, confusion about the meaning of the word Brahman arose, which led to a number of splits [1] in the arguments. After this confusion (then) and since the confusion is to be solved (therefore), the word Parabrahman is introduced by the author of these sutras, Shri Datta Swami, to mean God alone and not the other non-God items.

[1] Arguments resulting from greatly differing opinions about Brahman.