This is the 323rd most frequent Ukrainian word.
набагато
"Much" or "significantly."
In this sentence, 'набагато' is used to intensify the comparison described by 'складніше' (more complex), showing a significant degree of difference.
Ця проблема набагато складніше, ніж я думав.
This problem is much more complex than I thought.
Here, 'набагато' amplifies the extent to which 'глибшими' (deeper) has changed, emphasizing a measurable improvement.
Його знання в математиці стали набагато глибшими за цей рік.
His knowledge in mathematics has become much deeper this year.
In this example, 'набагато' highlights the marked difference in performance between the two computers, enhancing the comparative 'швидше' (faster).