When I woke up this morning, I saw a Push Notification on my phone from 'Facebook' saying something like 'Funny Video'. Accidentally clicked on it and it opened a tab in Chrome from with a URL of something like popads (although not entirely sure that was the link), at which point I immediately closed that tab.
Later today, I got another 'Facebook' push notification saying 'Hot summer, Cool Music!' (attached a couple screenshots of it). Besides for the overall sketchiness of the notification, I do not have Facebook on my phone, so it's clearly not legit.
I've had this phone for around 8 months, but this morning was the first time I got one of those notifications. I do not believe that I did anything particularly 'fishy' in the last day or so, and did not (at least knowingly) install anything on to my phone.
Is my phone compromised? What does that mean? What should I do to fix it (and other relevant questions...)?
For reference, my phone is a BLU R1 HD running Android 6.0.