LTI stands for Learning Tools Interoperability - it's a standard for integrating tools from third-party services into Learning Management Systems (LMS) like Blackboard, Canvas, Brightspace / Desire2Learn, Moodle, Sakai, etc.
In terms of Springshare products, the LibApps LTI Tool offers a way to seamlessly integrate content from LibGuides into Canvas.
If you are a faculty member interested in embedding library resources into your Canvas course, contact your subject librarian for more information and assistance.