Phonological and phonemic awareness are important because the ability to hear the sounds in words, take them apart, and put them back together develops an essential foundational pre-reading skill. This awareness of the sound units and individual sounds in words (/c/ /at/= cat, or /c/ /a/ /t/ = cat, supports students' progress with word recognition.

Phonological Awareness is the ability to identify and manipulate the spoken parts of words, i.e., syllables, onset-rime and phonemes.  

Phonemic Awareness- is the ability to hear, identify and manipulate individual sounds (phonemes) in spoken words.