when someone gives me a link on Fiverr then what should I do?

[iuseronline]

give me all communication tips for Fiverr.

[smashradio]

It depends on the link. Do you trust the sender, and is the link relevant to your conversation? Have you had a serious conversation with the individual on the other end, and does the link make sense in that context? If yes, perhaps it would make sense to click a link. For example, a buyer might ask you to design a logo and send you a link to their website to view their branding and get to know the company better. 

On the other hand, if someone sends you a random link, be very careful. It could lead to malware, phishing, or scams. 

You want to exercise some common sense here.