[CE] Complete other settings
1. Google captcha
Go to Engine settings > Settings > General.
Enable this option you can prevent spammers from registering and posting.
2. Pending ads
From Engine settings > Settings > Ads.
If you enable this option, an ad has to receive your approval before being displayed in the front-end, which means you can absolutely keep your site stay away from unsuitable ones.
Furthermore, you can decide to allow users to comment on an ad or not in this section.
3. Url slugs
You can easily create url slugs for the site following Engine settings > Advanced settings: