Sichtbarkeitsbestimmung

Could you confirm the full term after "Sichtbarkeitsb..." and the intended topic? The partial string could correspond to several concepts (for example Sichtbarkeitsbarriere, Sichtbarkeitsindex, Sichtbarkeitsbenchmark, etc.). If you provide the complete term or context (such as SEO, sociology, or digital media), I can write a concise, neutral, wiki-style article under 300 words.