As per an official post on the Skype blog,
Today, we’re excited to announce something new – a small change that will make a big difference to how people use Skype every day. We’ve started to roll-out the ability for users to invite anyone to join a Skype chat by sharing a unique link – send it however you want, in an email, on Facebook, WhatsApp, Messenger or Twitter.
To elaborate, Shareable Chat links is a feature which gives you a hyperlink which can be used by others — who may or may not be on your contacts list — to instantly join in a conversation with you. How? Simply by clicking the link you sent out to them via Facebook, WhatsApp, Messenger, Twitter or even e-mail! Pretty cool right?
Additionally, you can forward the link to someone who doesn’t have Skype installed on their system, and they can still join the chat as a guest from their computer using the Skype for Web service. The Skype for Web service supports the full range of services including one to one/group instant messaging, voice and video calls — all without having to go through the hassle of creating an account or even downloading Skype.
The “share link” feature is currently limited to PCs — You can join a chat by clicking the link on your iPhone or Android, but can not generate and send these links via mobile — although Microsoft is working hard to bring it onto mobile devices as well. Similarly, Skype For Web is currently limited to computers, while mobile devices need to have Skype installed in order to access chats.
While you may be itching to fire up Skype and try out the brand new feature, we would advice you to hold your horses, for at present the service is limited to the United States and the UK. However, Microsoft has promised to update Skype to reflect the changes for the “the rest of the world, over the next couple of weeks.”