Does this mean I will have the 10% exp bonus even When I played solo without my in game spouse?You’ve always received 10% more experience with the Pledge of Mara, but nothing actually stated that fact in the Crown Store. We’ve now fixed that. The more you know!
My understanding of the explanation that the ring gives is, whenever you are in group and around your pledged you will receive the bonus. I do not know how close the proximity of "around" is since it is not specified.