This is one of Narutoverse's most exciting topics - the gargantuan, gigantic tailed beasts (bijuus) and their shinobi hosts (jinchuurikis). The origin of all bijuus is from the Juubi, the ten-tailed beasts, whose jinchuuriki is none other than the Sage of the Six Path,  Hagoromo Ōtsutsuki, who eventually split the immense chakra of the Juubi to 9 smaller chakra-ed beasts, each with their own individual personalities and powers.

Let's start breaking 'em down, dattebayo!

Meanwhile, if you are interested, here's our Kyubi (Kurama) versus Jyubi (Ten Tails) comparison.