This is a sharp sign.
The Note F Sharp (F#)
A sharp sign written before a note on the staff means that you play the note that is one fret higher than the note written. For example, the note written on the staff above is called F sharp (F#), and is played on the second fret of the first string. When a sharp sign is written on the staff it is always written before a note.
Strum Pattern
Instead of writing a sharp sign before every F# note on the staff, it is easier to write just one sharp sign after the treble clef. This means that all the F notes on the staff are played as F#, even though there is no sharp sign placed before them.
Strum Pattern
Class Sessions
1- The Note E
2- The Note F
3- The Note G
4- The D Chord
5- Eighth Note
6- The Open D Note
7- Eighth Note Strum Patterns
8- The Dotted Quarter Note
9- INTRODUCTION
10- LESSON TEN
11- Notes and Rests
12- Eighth Note Strum Patterns in <span class="symbolA">^</span> time
13- Notes
14- Eighth Note Strum Pattern One
15- Alternate Picking
16- Two Bar Strum Patterns
17- Chords
18- Strum Pattern Number One
19- Eighth Note Strum Pattern Two
20- Eighth Note Strum Pattern Three
21- Eighth Note Strum Pattern Four
22- Two Bar Eighth Note Strum Patterns