Structure captions and on-image text for search intent inside Instagram.
What to do
Use audience vocabulary to describe the actual subject in the profile and caption. Keep descriptions natural and image text readable. Repetition cannot replace usefulness or guarantee discovery.
Practical example
A ceramicist names a stoneware pouring bowl and its use instead of filling the caption with unrelated popular phrases.
Check your result
Check that profile, caption and destination answer the same reader intent.