This is the 21st most frequent French word.
fait
"Fait" in English means "fact" or "done/made" depending on context.
Here, 'fait' is part of the fixed expression 'faire beau', describing the weather.
Il fait beau aujourd'hui.
The weather is nice today.
In this case, 'fait' is the past participle of 'faire', used here to express 'made' or 'created'.
Elle a fait un gâteau délicieux.
She made a delicious cake.
Here, 'fait' serves as part of the expression 'faire plaisir', meaning 'to bring/give pleasure'.