Schema suggestions — Apply, or decline
Apply carries the change out. Where several suggestions only add things — a calculated column, a link, an automation — the panel offers to apply those together; changes that alter or remove something stay one at a time, so it is always clear which one mattered.
Not for me declines a suggestion for the whole workspace, and it sticks. Declining is remembered against what was proposed rather than how it was worded, so the same idea cannot come back in a new phrasing on the next run.
You will never be nagged about work you have already done. Before anything is shown, each suggestion is re-checked against your live schema — so a change you made yourself in the field editor, through an import, or over the API retires its suggestion automatically, with nothing to tick off.