The number of lines radiating from each point indicates its charge. The direction of rotation indicates its sign, e.g. clockwise = positive charge, counterclockwise = negative. Here the closed lines may be interpreted as lines of equipotential. Note also that the movement of the equipotential lines towards or away from the charges depends on the sign of the charge. The two families of lines always intersect at right angles.
But an alternate interpretation allows more interesting images.
Interpret the point charges as cross-sections of charged wires oriented perpendicular to the plane of the image. When a wire also carries an electric current, the magnetic field around that wire is represented by a closed loop. Under this interpretation the first image is a special case in which the value of the electric field equals that of the current's magnetic field.
In this image one wire contains a magnetic charge (from hypothetical "monopoles") and also carries a magnetic monopole current. Note that just as electric lines of force terminate at positive or negative charges, so do magnetic lines of force terminate at north or south magnetic charges.