Full Bend
FULL BEND: Play the note and push the string up to the tonal value of 2 frets. This means if you play the note on the 7th fret and bend up a "Full" amount then the sound produced will be the equivalent top laying a note on the 9th fret.
Listen to a full bend
Bending Riff 1
This riff is using the 1st A Minor Pentatonic Scale
Listen to the full bend riff example

Watch the how to play the above riff using full bends
Half Bend
HALF BEND: This is all exactly the same as the full bend only you would be bending to the equivalent of 1 fret instead of 2.
Listen to a half bend riff example
Bending Riff 2
This riff is using the A Minor Scale - Pattern 1
Listen to the half bend riff example

Watch the how to play the above riff using half bends
There are also other bending increments like:
- 1/4 bend (note value of half a fret)
- 1 & 1/2 bend (note value of 3 frets)
- 2 Full bend (note value of 4 frets) - this is rarely used in songs and is more easily played if you have lighter gauge strings on your guitar.