Scale also helps when it comes to an ever more popular companion to free shipping: free returns

companion to我查了下朗文詞典，有這個講解 one of a pair of things that go together or can be used together。

紅色的這個意思是不是就是對應這個講解

謝謝

網友把 companion 理解為“成對的物品之一”。我感覺，這里仍然指“伙伴”（快遞公司或快遞人）。

Scale also helps when it comes to an ever more popular companion to free shipping: free returns.

【翻譯】當涉及到一個愈加受青睞的免費送貨伙伴免費退貨時，（快遞公司）規模（大）也有好處。