Engines often search the web with a reworded version of your prompt. Tick Show prompt diffs beside Searches the engine ran in an answer, and each search is marked against your prompt: words the engine added are shown in green, and words it dropped are struck through in red. Hover a marked word to see which it is.
How it is worked out
Your prompt and each search are compared word by word, in the order of the search. Case and punctuation at the edge of a word are ignored. Words only in your prompt are shown before the words that replace them.
Where to find it
Open an answer from Prompts, then find Searches the engine ran.
What to do next
Words engines keep adding are often the ones to put in your own pages. See Prompt detail.