The Hearer, The One who Hears all things. His eternal hearing without an ear, instrument or organ.
Allah is As-Sami (in Arabic: ٱلْسَّمِيعُ) the perpetual hearer. He pays attention to every supplication, listening to all who reach out to Him. Whether we speak loudly or in secrecy, English or in French, Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ hears it all.
From the root sin-mim-ayn (س م ع) which has the following classical Arabic connotations: to hear, to listen, to accept, to receive, to be told, to pay attention to, pay regard, to understand the meaning.
Qul in dalaltu fainnamaaa adillu ‘alaa nafsee wa inih-tadaitu fabimaa yoohee ilaiya Rabbee; innahoo Samee’un Qareeb
Say, “If I should err, I would only err against myself. But if I am guided, it is by what my Lord reveals to me. Indeed, He is Hearing and near.” (Qur'an 34:50)
From this ayah, we learn Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ is near to all of us, and He is forever listening. Whatever it is you want, make du'a and ask of it from Allah the Almighty. There is no limit and nothing He can't fulfill. This attribute is also a reminder if you need someone to talk to, He will always be there to lend a listening ear. We don't have to go to His house (Kaabah) just to be close to Him. "And when My servants ask you, [O Muhammad], concerning Me – indeed I am near. I respond to the invocation of the supplicant when he calls upon Me" (Qur'an 2:186)
All humans, on some level, crave to be loved and heard. And sometimes, the people closest to us can hurt us the most because we expect them to reciprocate interest, and when they don't, it feels like a betrayal. We've taken time to listen to them, but they turn around and prioritize their own lives, issues, and problems. It can feel isolating. We should recognize a good friend is someone who will listen not just when we've got good news but when we're down. In the Qur'an, Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ reassures us many times that He is the eternal hearer. The best friend/listener you could ask for. We can always fall back and know He is listening and available for us. Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ also makes this point heard by repeating this name for a total of 45 throughout the Qur'an.
Qad sami’al laahu qawlal latee tujaadiluka fee zawjihaa wa tashtakeee ilal laahi wallaahu yasma’u tahaawurakumaa; innal laaha samee’um baseer
"Certainly has Allah heard the speech of the one who argues with you, [O Muhammad], concerning her husband and directs her complaint to Allah. And Allah hears your dialogue; indeed, Allah is Hearing and Seeing." (58:1)
This ayah also shows a second meaning to the name Sami which is 'hearing the speech' or acceptance. For example, when a person praying comes up from ruku they say, سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ Sami Allahu liman hamidah, meaning 'Allah hears the one who praises Him.'  This does not imply that Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ only hears those who exalt Him in prayer and that everyone else falls by the wayside.
At some low point in our lives, we may have questioned whether Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ has heard our prayers. In a moment of weakness, the shaitan whispers in our ears, tricking us into thinking our supplication went "unheard." This is faulty thinking. Just because we immediately didn't get what we wanted doesn't mean He hasn't heard our prayer. Remember that even Prophet Yaqub (as) spent many years separated from his son Yusuf (as). He grieved as any father would. The Qur'an states Yaqub (as) vision became impaired from the stress, sorrow and the frequent sobbing. But Yaqub (as) never wavered in Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ plan for Him, and he kept turning to Him, praying, making du'a, asking that he be reunited with his son. He would say, "I only complain of my suffering and my grief to Allah…" (Qur'an 12:86) and "And Allah has full power and control over His Affairs, but most of men know not." (Qur'an 12:21) Eventually, His du'a went from being heard to accepted and he was reunited with his son.
The other subtlety that's often missed, which encompasses the name al-Sami, is Allah's acceptance and/or His response. This is why Prophet Ibrahim and Ishamel (may peace be upon them) asked Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ the following in their du'a after building the Kaabah:
Wa iz yarfa’u Ibraaheemul qawaa’ida minal Baitiwa Ismaa’eelu Rabbanaa taqabbal minnaa innaka Antas Samee’ul Aleem
"And [mention] when Abraham was raising the foundations of the House and [with him] Ishmael, [saying], “Our Lord, accept [this] from us. Indeed You are the Hearing, the Knowing." (Qur'an 2:127)
Learning about as-Sami is a reminder to ourselves to become better listeners. Just as Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ tells us He listens, can we say the same? How closely have we heard and understood the calling of Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ? Could we do better in following what was shown to us for guidance?
From this, we also see the importance of the role communication plays in our lives. How would you assess or grade your listening skills? It truly is an art form to be mastered. A mother who is upset with her son may not really be upset about the subject matter. If it's a common occurrence, it may be seeking attention in the only way she knows the son will respond. Good communication is picking up on or asking ourselves if we're missing something other than what's being said.
In the hadith narrated by Abu Musa: We were with the Prophet (ﷺ) on a journey, and whenever we ascended a high place, we used to say, "Allahu Akbar." The Prophet (ﷺ) said, "Don't trouble yourselves too much! You are not calling a deaf or an absent person, but you are calling One Who Hears, Sees, and is very near." 
Find comfort in knowing we are never truly alone, "you are calling One Who Hears, Sees, and is very near." The world may misunderstand you, but Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ knows the purity and kindness that lives in your heart. He understands what's really being said and what we need.