The 40 tells · Shape and punctuation · No. 40
Truly, incredibly, really in your writing: why readers notice
Smell Adverb doing a fact's job
"Truly unique", "incredibly easy", "really powerful". Intensifiers make a claim louder without making it more believable. They are a sign the sentence is short of a fact.
Delete the adverb and read the sentence again. If it goes flat, it needed a number, not a stronger word.
Before
It's incredibly easy to use and truly powerful.
After
Most people send their first invoice within five minutes of signing up.
The fix
Delete it. If the sentence goes flat, add a fact.
What the checker matches
A pattern match. In plain terms: adverb doing a fact's job.
\b(truly|incredibly|extremely|highly|totally|absolutely|genuinely|literally|undeniably|remarkably)\b