The reason for studying the Quran & its correct interpretation (the Tafseer) is obvious: the Quran is one of the two fundamental textual sources of Islamic knowledge. The other fundamental textual source is the Hadith literature which will discuss in the next chapter. Being the main source for knowledge it behooves us as Muslims and specially as students of knowledge to learn as much from the Quran and its authentic Tafseer or the correct interpretation as possible. For that end, learning Arabic is a fundamental requirement, as was discussed in the last chapter.
Learning the Quran has many aspects.
There are many areas of study when it comes to the Quran. Learning to read the Quran properly is from the knowledge of Tajweed (proper recitation with the correct pronunciation rules). Learning the meanings of words comes from the knowledge of the Arabic of the Quraish tribes in Mecca in Arabia at the time when the Quran was revealed. Learning the reasons of revelations is derived from the Hadith concerning the Asbaab un Nuzool to provide the correct historical context and the events that occurred at the time and the people that the verses may have been addressing and so on around the time of the revelation. Learning the true meanings and application of the text of the Quran comes from the many authentic traditions found in the Hadith where the Prophet (ﷺ) himself explained the meanings of the verses revealed to the companions who recorded, related and passed down the information to be collected later on in the Hadith collections. All of these areas of study serve to provide a complete understanding of the Quran. Failing to take any of these into account could potentially result in a deficient or partial or even incorrect understanding of the Quran.
And Allah knows best.