This is the 5486th most frequent French word.
blague
Joke.
Here, 'blague' is used to represent a humorous statement or story intended to make people laugh.
C'est une blague très amusante.
That's a very funny joke.
In this case, 'blagues' refers to humorous remarks or actions that are inappropriate given the formal context of a presentation.
Ne fais pas de blagues pendant la présentation.
Don't make jokes during the presentation.
Here, 'blague' is used to differentiate between something humorous or deceptive and a serious expression or statement.