Why in this sentence comma(,) is used? Would it give another meaning to the whole sentence without commas?
Answer from a Native speaker
Here commas are used to separate the descriptive words from each other! If a noun has more than one coordinate adjective before it, adjectives of equal weight, then they are "listed" with commas. Additionally, the extra pause emphasises the descriptive words mentioned. If you add "and" in between the adjectives, the function would be the same as the commas. In terms of being grammatically correct, I'd say not to remove the commas here, especially in formal writing. Also, the tone would change slightly since the emphasis would move to either the object or action of the sentence. Ex: The enormous, scary trucks were getting closer. => commas = The enormous and scary trucks were getting closer. => and Ex: They walked across a high, precarious bridge. = They walked across a high and precarious bridge.