照相 (zhào xiàng) is a separable verb (离合词) meaning 'to take a photo' — you can insert words between 照 and 相 (e.g., 照了很多相). It's the everyday, colloquial term for still photography. 拍照 (pāi zhào) is similar but cannot be split; 拍摄 (pāi shè) and 摄影 (shè yǐng) are more formal.