This is the 14473rd most frequent Russian word.
очевидный
Obvious.
Here, 'очевидно' (obvious) is used as an adverb to emphasize the clarity or self-evidence of the statement.
Это очевидно, что погода сегодня прекрасная.
It is obvious that the weather is beautiful today.
In this case, 'очевидной' is the feminine singular form of the adjective 'очевидный', describing the noun 'победа' (victory).
Его победа была очевидной для всех.
His victory was obvious to everyone.
Here, 'очевидной' is again an adjective form, used to describe 'уверенность' (confidence), indicating that the confidence is noticeable and clear.