Plz help me fast i want to know!
Asalaam o alaikum, Basicly, it is about pronunciation, chanting of verses., perhaps dependent on the country and dilect you use. But essentially this could also be classed as "innovation",or based on Islamic secondary sources, (schools of thought) Allah knows best,
Hafs and Warsh are two 'transmissions' of the Quran from allegedly two different 'recitations' (qiraat). It is asserted that the 'Hafs' transmission reaches us in the name of the reciter, Abu Bakr 'Asim and the 'Warsh' transmission, in the recitation of 'Nafi'. Both transmissions are recited in the Muslim world today.
Hafs (in the abbreviated name of the alleged transmitter - Hafs al-Asadi al Kufi) is the transmission of the Quran recitation (that of Abu Bakr 'Asim) that the majority of the Muslim world is familiar with. This is the universally accepted transmission of the Quran.
Warsh (in the name of the alleged transmitter - Uthman Ibn Sa'id al-Qutbi) is the transmission of the Quran recitation (that of Nafi) that isolated parts of the Muslim world such as the North African countries are familiar with.
The Qiraat is generally understood as the manner of pronunciation of the Quran during recitation. However, there are some differences between them . Seven different recitations are commonly referred to by Muslim academics. However, there are more recitations known which all have their support in Islamic secondary sources.
The main recitation used throughout the Muslim world is known under the name of its alleged reciter, Abu Bakr 'Asim (born circa 1st century AH). However, it appears that none of the recitations have the intention to alter the message of the Quran and they certainly are not 'different versions' of the Quran as commonly alleged by Muslim polemics. It is alleged that it was Abu Bakr Ibn Mujahid (d. 936CE) that established the 'seven acceptable recitations' (qiraat) of the Quran which he chose from a selection of other works which alleged a number of different recitations. However, a close examination of the chains of narrations for the support of the various recitations has left some scholars a little dubious about their veracity, as they are based on isolated reports. This was approximately 300 years after the death of the Prophet.
Book 15, Number 15.4.5:Hadith
Yahya related to me from Malik from Ibn Shihab from Urwa ibn az-Zubayr that Abd ar-Rahman ibn Abd al-Qari said that he had heard Umar ibn al-Khattab say, "I heard Hisham ibn Hakim ibn Hizam reciting Surat al-Furqan (Sura 25) differently from me, and it was the Messenger of Allah, may Allah bless him and grant him peace, who had recited it to me. I was about to rush up to him but I granted him a respite until he had finished his prayer. Then I grabbed him by his cloak and took him to the Messenger of Allah, may Allah bless him and grant him peace, and said, 'Messenger of Allah, I heard this man reciting Surat al-Furqan differently from the way you recited it to me.' The Messenger of Allah, may Allah bless him and grant him peace, said, 'Let him go.' Then he said, 'Recite, Hisham,' and Hisham recited as I had heard him recite. The Messenger of Allah, may Allah bless him and grant him peace, said, 'It was sent down like that.' Then he said to me, 'Recite' and I recited the sura, and he said, 'It was sent down like that. This Qur'an was sent down in seven (different) ways, so recite from it whatever is easy for you .' " 
THE QURAN'S OWN TESTIMONY
The Quran, the primary source of guidance for a believer, categorically negates the basis of any allegations for multiple recitations (qiraat) or variants (ahruf).
The Quran confirms that only one recitation was revealed to the Prophet based on one collection. It was this recitation that the Prophet was instructed to follow.
075:17-18 "Indeed, Upon Us is its collection (Arabic: jam'ahu) and its recitation (Arabic: qur'anahu). And when We have recited it (qaranahu) then follow its recitation (Arabic: qur'anahu)"
The Quran was also revealed in the native tongue of the Prophet.
019.097 “And We make (this Scripture) easy in your tongue (Arabic: bilisanika), only so that you may bear good tidings with it to the righteous and warn with it a people hostile / contentious”
All previous revelations were sent in the native tongues of the chosen messengers.
014.004 “And We did not send any messenger but with the language of his people, so that he might explain to them clearly; then God lets go astray whom He wills and guides whom He wills and He is the Mighty, the Wise”
Therefore, the claim of variant readings or multiple recitations has absolutely no basis in the Quran. The Quran was simply revealed in the prophet's vernacular without any variations and in one manner of recitation.
The Quran has also been transmitted 'mutawwatir' with the consensus of the Muslim community generation after generation from the time of the Prophet.
It is only the majority / universal recitation that can be accepted as the original recitation and indeed even today the Muslim community is agreed on one universal recitation which remains in the Prophet's vernacular.
Indeed, some isolated parts of the Muslim world such as parts of Tunisia, Morocco and Algeria may use a slightly different recitation method, but the differences are so insignificant that they do not intend to alter the message of the Quran.
039:018 "Those who listen to the Word (the Quran) and follow the best meaning in it / best of it (Arabic: fayattabi'una ahsanahu) those are the ones whom God has guided and those are the one's endowed with understanding (Arabic: Albabi)
039.055 "And follow the best of what is revealed to you from your Lord, before the penalty comes to you suddenly while you do not perceive!”