Update weble-cloud-site-to-site.md

docs/weble-cloud-site-to-site.md

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 # Site to site
 
+A site-to-site virtual private network (VPN) is a connection between two or more networks, such as a corporate network and a branch office network. Many organizations use site-to-site VPNs to leverage an internet connection for private traffic as an alternative to using private MPLS circuits.
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+Site-to-site VPNs are frequently used by companies with multiple offices in different geographic locations that need to access and use the corporate network on an ongoing basis. With a site-to-site VPN, a company can securely connect its corporate network with its remote offices to communicate and share resources with them as a single network.
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 ## Create a Site-to-Site
 
 Go to "site-to-site" configuration page