Addison

Addison is one of the people that work for Rhondson and Hudson in Hudson Construction. He is tasked with putting up signs all over Hyrule to advertise the company, but because he can't make them stand on their own, he'll need Link's help and a little bit of Ultrahand to build makeshift support and complete the task.

You won't be able to glue stuff to Addison's signs. Instead, you'll need to build something supporting the sign at the right angle once Addison lets go of it.

If you succeed, he'll reward you with some rupees, food, and a miscellaneous item.

You'll run into Addison several times during your adventures in Hyrule, as he is literally all over the map. As a rule of thumb, Addison is probably close by whenever you see one of Hudson Construction's sites with materials on it.