Samsung Galaxy A5 (2017) starts receiving Android 8.0 Oreo
Aside from Samsung Experience 9.0 and Android Oreo goodies, if you own a Galaxy A5 (2017), you should also get the April security patch, although we don't rule out the possibility of getting the newer May security update.
Keep in mind that it's recommended to make a back of your personal data, but not mandatory. Also, some apps like Samsung Pay, Samsung Internet, Samsung Notes, and E-mail may have to be manually updated after you upgrade to Android 8.0 Oreo.
source: Mobilissimo (Facebook)