lot of Google bots visiting my site

it came to my attention that there are a lot of these messages in WordFence. What are these and are they safe?

United States Mountain View, United States visited http://domain.marketing/
4 minutes ago IP: [block] Hostname: crawl-66-249-79-29.googlebot.com
Browser: Google Bot version 2.1
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
[Block this IP] — [Block this network] — [Run WHOIS on] — [See recent traffic]