Hey guys,

I was wondering what it means when some one puts brackets around a chord. The example I am thinking of is here

Around every second chord is a bracket and I was wondering if that was meant to indicate how I am meant to strum the guitar.

A pretty basic question but I really want to know before I learn this song off by heart.

any help would be appreciated.
Chords in parentheses are played during the 4th beat of the previous chord's measure.

its on the link you posted
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