Mozilla/5.0 (compatible; online-webceo-bot/1.0; +http://online.webceo.com) - This user-agent is used for Site Crawler tools.
Mozilla/5.0 (compatible; seo-audit-check-bot/1.0) - This user-agent is used for Site Crawler tools on White Label Domains.
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36 - This user-agent is used if the main Site Crawler bot cannot reach a site.
Mozilla/5.0 (iPhone; CPU iPhone OS 12_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1 Mobile/15E148 Safari/604.1 - This user-agent is used to check if a site has Flash content and AMP.
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36 - This user-agent is used to make snapshots of a site's homepage and to request favicons.