Listen to a song you like.
Start counting, 1 2 3 4 or 4 beats
This is the beat used in almost all popular music
A musical bar is a unit of time divided into beats
Most of the time each bar has 4 beats
Chords are played or strummed in each bar
A whole note has a count of 4 beats.
Play along with this audio.
This is G major to E minor, G major whole note for 2 bars
then E minor whole note for 2 bars
then repeated for a total of 8 bars
with a one final bar ending on G major whole note.
Each strum has a count of four beats in each bar.
The important thing to learn here is to keep a solid consistent rhythm, in this case
100 BPM (beats per minute)
This is the Merriam-Websters definition of "rhythm"
as related to music.
1 a : an ordered recurrent alternation of strong and weak elements in
the flow of sound and silence in speech b : a particular example or
form of rhythm <iambic rhythm>
2 a : the aspect of music comprising all the elements (as accent, meter,
and tempo) that relate to forward movement b : a characteristic rhythmic
pattern <rumba rhythm>; also : 1METER 2 c : the group of instruments
in a band supplying the rhythm -- called also rhythm section