Well, God Almighty Said:
”And I did not Create the jinn and humans except they should worship Me.” [Noble Quran 51:56]
And He does not need anything from us
neither our worship because God Himself Has Said:
”Certainly, God stands not in need of any of the worlds.”
But it is beneficial why, because it makes us getting closer to God and that is why we’re praying to Him and also God Almighty Says:
“And I have chosen you, so listen to that which is inspired to you. Verily, I am God! There is none worthy of worship but I, so worship Me and offer prayer perfectly for My remembrance.” (Quran 20:13-14)
Also prophet Muhammad said:
“The first matter that the slave will be brought to account for on the Day of Judgment is the prayer. If it is sound, then the rest of his deeds will be sound. And if it is incomplete, then the rest of his deeds will be incomplete.”
Oh, and take another look at this when prophet Muhammad said:
“God has obligated five prayers. Whoever excellently performs their ablutions, prays them in their proper times, completes their bows, prostrations and khushu, has a promise from God that He will forgive him. And whoever does not do that has no promise from God. He may either forgive him or punish him.”
This are only example of what are we benefit from praying, but there are many benefits of it. The thing that we pray to God is, that we remember Him and that praying will get us closer to Him on the day of judgement by doing good deeds and perform prayers. And praying also purify you from evil, it keeps you clean because God Almighty likes people who keeps themselves purified.
For more informations, check the site below
- http://aboutislam.net/reading-islam/finding-peace/remembering-allah/allah-doesnt-need-prayer-obligation/