Beginner Translation
You got your arms or legs to the better inside path, which usually gives you more control options.
What It Does
Inside position helps with pummeling, underhook-style battles, standing control, guard structure, and many transitions where alignment matters.
Where You See It
You see inside position in clinches, guard battles, pummeling drills, and upper-body control exchanges.
Why It Matters
Beginners often find many exchanges easier once they stop thinking only about moves and start noticing who owns the inside space.