Use when creating or editing text ads in Yandex Direct via API v5 (Ads.add / Ads.update). Since mid-2025 classic TextAd is replaced by combinatorial "ResponsiveAd" — 1–7 titles and 1–3 texts the system auto-combines. Symptoms — Title2 ignored/dropped, "second headline" missing, ad created as RESPONSIVE_AD, need multiple headlines/texts/variants, overlong title silently omitted.
