What is the point of checking getClass() != o.getClass()?

Question

Java

Good day.
There is an example implementation of the equals() method:

public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    Vertex vertex = (Vertex) o;
    return Objects.equals(getId(), vertex.getId()) &&
        getState() == vertex.getState() &&
        Objects.equals(getVertices(), vertex.getVertices());
}

The question arises, what is the specific essence of this check?
getClass() != o.getClass()
Thanks to.