Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

Lag or latency will usually result from issue with a wireless connection, configurations on your router or congestion along your way to the server. If you are on using a wireless connection, try connecting with an Ethernet cable. Additionally, try resetting your router by turning it off for a few minutes, then back on.

If you are still having issues after that, I'd suggest contacting your ISP and making a report with them.

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