The goal of this thesis is to study the distribution of automatic sequences along certain subsequences and other properties of automatic sequences. Most prominently, we will show that all automatic sequences fulfill the Sarnak Conjecture. Automatic sequences are sequences a(n) on a finite alphabet that are the output of a finite automaton. There are very close relations to dynamical systems, to digital expansions, to uniformly distributed sequences and also to number theory. We use Fourier analytic methods, that have been developed by Mauduit and Rivat - and a refined version by Drmota, Mauduit and Rivat - and generalise their results, concerning the distribution of sequences along certain subsequences.