footprints, traces, tracks
蹤 centers on marks left behind by movement: footprints, traces, or tracks that show where someone or something has been.
蹤 combines 足 (foot) with 從, which likely contributes the sound and the idea of following or moving. Together they suggest footprints or traces left by feet.
The left side is the foot radical 足, and the right side 從 suggests following. Picture a line of footprints left behind as someone walks, showing the path they followed.
For ショウ, imagine a detective showing footprints to a suspect: show -> ショウ, and the tracks reveal where the person went.