"أن " has several meanings. As a conjugation it could mean ' that': من المعروف أن It is well known that ..... It could also mean 'to': هو يريد أن يشرح الكلمة He wants to explain the word هل من الممكن أن أستخدم هاتفك؟ Is is possible to use your phone?

we use this when we want emphisize on something..