What are tactics


A legit question. I didn't know what they were until I joined this site a year ago.
Dan Heisman offers the following definition:
Tactics -- A forcing set of moves that involves piece safety and checkmating (A defensive tactic prevents these). This includes:
1) En Prise (can take a piece for free)
2) Counting (is each piece safe from potential capturing sequences?)
3) Motifs (pins, double attacks, removal of the guard, etc.)
4) Non-sacrificial combinations of motifs
5 Sacrificial combinations
Most people are familiar with #3: forks, pins, etc.
For beginners once you get past the stage of simply hanging pieces, or not noticing when your opponent is hanging a piece -- tactics are essential study. Even up to the 2000 rating. There is no substitute.

This definition accounts for the criteria used by modern tactical training resources in the digital age.
*** Updated definition of tactics by dannyhume, copyright 2022-04-01.