Attraction is a tactical idea that involves luring an enemy piece to a new position where it can be exploited. This concept, along with other important tactical ideas, is covered in detail in my chess tactics video course:
Attraction Tactics Example #1
Black to move.
Solution
1… Rxf4+ 2. Kxf4 Bh6+ 3. Ke5 Bxc1
Attraction Tactics Example #2
Black to move.
Solution
1… Bg5 2. Qxg5 Nh3+ 3. Kg2 Nxg5
Attraction Tactics Example #3
Black to move.
Solution
1… Rc1+ 2. Bf1 Rxf1+ 3. Kxf1 Rc1+ 4. Rd1 Rxd1#