Interpersonal Therapy is an approach which focuses primarily on current relationships and negative thoughts or behaviors associated with them. This approach differs from methods like CBT as it tends to avoid looking at past relationships or issues that don't directly deal with the quality of present-day relationships.
IPT provides you with tools and strategies to deal with four main areas: interpersonal deficits, unresolved grief, difficult life transitions, and interpersonal disputes.
You can expect sessions to be either one-on-one or group format. In the beginning, there will be a large emphasis on your therapist getting to understand any mental health symptoms you may be suffering, as well as understanding your current relationships. As sessions progress, your therapist will work with you to identify problem areas and provide strategies for resolving them.
To make meaningful and consistent progress, your therapist will likely assign "homework" outside of session to solidify and implement the strategies they have provided.