This is the 304th most frequent Ukrainian word.
значно
"Significantly" or "considerably."
The word 'значно' here is used as an adverb to indicate a large extent or degree of comparison.
Цей журнал значно важчий за той.
This magazine is significantly heavier than that one.
In this sentence, 'значно' serves as an adverb to describe the degree to which an improvement has taken place.
Він значно покращив свої навички програмування.
He has significantly improved his programming skills.
Here, 'значно' modifies 'більше', intensifying the comparative adjective to emphasize the extent of understanding gained.