This a Shuffle 12 Bar Blues Progression in D using D7, G7 and A7. Use it to practice soloing. D Minor Pentatonic and Minor Blues work the best. D Major Pentatonic and D Major Blues work well too.
Here's a SLOWER Blues Shuffle in C backing track here
https://youtu.be/-nCzluz996w
I have a similar Blues Shuffle in E backing track here
https://youtu.be/ZdeGVGg5J_4
Enjoy!