APIs allow you to load scripts: geo-tracking, search engines, translations, etc.
Audience measurement services allow the generation of useful visit statistics to improve the site.
Comment managers allow you to make comments and work to prevent spam.
Social media allows us to make the site more interactive and to promote it by sharing.
Support services allow you to contact the site management team and help improve the site.
Video sharing services allow the enrichment of the site with multimedia content and raise its visibility.
Services to display web content.