When evaluating CTR, we compare ranges of positions for the same search terms, pages, devices, and countries. Search demand or search result layouts may change while changing the title, so the title effect cannot be confirmed solely by the numbers before and after the change.
The title and description should accurately convey what the actual page is about and why a visitor should choose it. Encouraging clicks with exaggerated offers can result in lost trust after the visit. Also check whether each search function is supported and its actual display status.