The dominant 7 sus4 chord can be found in most genres of music; blues, jazz, rock, classical, folk, hip hop, etc… This simple exercise should help you become familiar with the 4 notes of the the sus4 7th chord using an interesting melodic shape.
In a C7 chord, the 4 notes are C (the root), E (the major 3rd), G (the 5th), Bb (the b7th).
In a C7 sus4 chord the notes are C (the root), F (the suspended 4th which is one half step above the major 3rd found in the C7 chord), G (the fifth) and Bb (the b7th).
For most practical purposes the chord can be treated as a regular dominant 7 in terms of how it functions harmonically.
Once you’re comfortable with the primary 4 notes of the sus 4 7th chord try improvising freely with the group of notes in each key.
Sing along and visualize fingerings with this: