How much energy you can earn from a solar panel, depends on how intensive the sun shines on the panel surface.
Therefore, you want to orient your panel towards the sun. With an accurate orientation, you can easily double you energy harvest of a day.
But sometimes it is hard to find a spot where the panel points towards the sun. At the latest some hours later you have to find a different spot because the sun has moved.
The video gives you an overview about the adjustable stand. In addition, I visualize how the sun shines on the panel during the day and in spring, summer etc. (English subtitles)
As I explain in my blog entry https://ewap.ch/solarpannel-zur-sonne-ausrichten/ I do not charge my smartphone directly from the solar panel. I like to use my phone during the day and charge it in the evening.
So, I charge during the day my USB power bank and during the night my phone from the power bank.
From one day it I get one full charge for my phone or a 50% charge for my tablet.