Alerts are used mostly by journals to send you an email notification when a new issue has been released. Some journals also issue alerts when a new article is available online before the whole issue is complete. The email will usually replicate the table of contents with a link to each item within in the issue but could be just a simple link to the issue as a whole. Results from email alerts should be used while on-campus as the full-text links in the email will not work from off-campus; to access the full text of articles/journal alerts from off-camus, use the Libraries' Library One Search and/or Journal Title Lookup.
For each journal from which you want an alert, go to the journal's website using the Libraries' Journal Title Lookup. On the site, look for a link or button for "Alerts"; if one is not available, look under headings such as "My Profile", "My Account" or "My Settings". Many journals have some form of alerting service, but how it is set up and what the alert involves varies from publisher to publisher and sometimes even titles from the same publisher may have different features available.