The users' web statistics on Siteground servers are updated every night. This update may be delayed by high server load or software problems.
If your statistics have not been updated for more than 24 hours you can manually update them by logging in your Cpanel and going to Web / Ftp Statistics, Awstats. There you will find a button "Update Now" which will update your Awstats statistics immediately.
For the update of the other statistics in Cpanel you will have to wait for the next server's update.