RNA stands for Ribose Nucleic Acid.
It is a single-stranded chain of nucleotide.
According to the central dogma of biology, it functions as the carrier of genetic information therefore it is involved in protein synthesis.
Note: It also acts as a genetic code/material in some viruses.
RNA is formed from DNA using the process called transcription.
The nitrogenous bases present in RNA are similar to DNA except one that is in place of Thymine(T), RNA has Uracil(U).
RNA are basically of three types:
mRNA(messenger RNA): encodes for amino acid for protein synthesis.
rRNA(ribosomal RNA): attaches the amino acids to mRNA.
tRNA(transfer RNA): brings the amino acid to mRNA for protein synthesis.
There are other RNA as well based on their size and fuction.