What is Istikharah prayer?



اللَّهُمَّ إِنِّي أَسْتَخِيرُكَ بِعِلْمِكَ وَأَسْتَقْدِرُكَ بِقُدْرَتِكَ وَأَسْأَلُكَ مِنْ فَضْلِكَ الْعَظِيمِ فَإِنَّكَ تَقْدِرُ وَلَا أَقْدِرُ وَتَعْلَمُ وَلَا أَعْلَمُ وَأَنْتَ عَلَّامُ الْغُيُوبِ اللَّهُمَّ إِنْ كُنْتَ تَعْلَمُ أَنَّ هَذَا الْأَمْرَ خَيْرٌ لِي فِي دِينِي وَمَعَاشِي وَعَاقِبَةِ أَمْرِي - أَوْ قَالَ: فِي عَاجِلِ أَمْرِي وَآجِلِهِ - فَاقْدُرْهُ لِي وَيَسِّرْهُ لِي ثُمَّ بَارِكْ لِي فِيهِ وَإِنْ كُنْتَ تَعْلَمُ أَنَّ هَذَا الْأَمْرَ شَرٌّ لِي فِي دِينِي وَمَعَاشِي وَعَاقِبَةِ أَمْرِي - أَوْ قَالَ: فِي عَاجِلِ أَمْرِي وَآجِلِهِ - فَاصْرِفْهُ عَنِّي وَاصْرِفْنِي عَنْهُ وَاقْدُرْ لِي الْخَيْرَ حَيْثُ كَانَ ثُمَّ أَرْضِنِي بِهِ
ALLAHUMMA INNI ASTAKHIRUKA BI ILMIKA WA ASTAQDIRIKA BI QUDRATIKA WA AS'ALUKA MIN FADLIKA AL-AZIM, FA INNAKA TAQDIRU WA LA AQDIRU WA TA'LAMU WA LA A'LAMU WA ANTA ALLAM AL-GHUYUB. ALLAHUMMA IN KUNTA TA'LAMU ANNA HADHA AL-AMRA KHAYRUN LI FI DINI WA MA'ASHI WA AQIBATI AMRI - AW QALA: FI AJILI AMRI WA AJILIHI - FAQDIRHU LI WA YASSIRHU LI THUMMA BARIK LI FIHI, WA IN KUNTA TA'LAMU ANNA HADHA AL-AMRA SHARRUN LI FI DINI WA MA'ASHI WA AQIBATI AMRI - AW QALA: FI AJILI AMRI WA AJILIHI - FASRIFHU ANNI WASRIFNI ANHU WAQDIR LI AL-KHAYR HAYTHU KANA THUMMA ARDINI BIHI
O Allah, I seek Your guidance through Your knowledge, and I seek Your empowerment through Your power, and I ask You from Your great bounty. For You have power and I am powerless, You have knowledge and I am ignorant, and You are the Knower of the unseen. O Allah, if You know that this matter is good for me in my religion, my livelihood, and the outcome of my affairs - or he said: in my immediate and future affairs - then decree it for me and facilitate it for me, then bless me in it. And if You know that this matter is bad for me in my religion, my livelihood, and the outcome of my affairs - or he said: in my immediate and future affairs - then turn it away from me and turn me away from it, and decree for me what is good wherever it may be, then make me satisfied with it