Your debug log shows your Pi-Hole is working normally and has processed the following traffic in the previous 24 hours.
[2019-06-20 20:00:58.551 1447] Imported 11521 queries from the long-term database
[2019-06-20 20:00:58.553 1447] -> Total DNS queries: 11521
[2019-06-20 20:00:58.554 1447] -> Cached DNS queries: 393
[2019-06-20 20:00:58.554 1447] -> Forwarded DNS queries: 9461
[2019-06-20 20:00:58.555 1447] -> Exactly blocked DNS queries: 788
[2019-06-20 20:00:58.555 1447] -> Unknown DNS queries: 879
[2019-06-20 20:00:58.555 1447] -> Unique domains: 600
[2019-06-20 20:00:58.555 1447] -> Unique clients: 15
[2019-06-20 20:00:58.556 1447] -> Known forward destinations: 13
If you are seeing ads, perhaps the ads are being delivered in such a way that Pi-Hole cannot block them. Can you provide an example of a website where you are seeing ads, along with a screen snap of what you see on your browser?