Hide, grow and hang
Trellis panels are a great solution if there is screening required at some point in the garden to hide a shed or a compost bin. If they are not part of a fence installation, they will need supporting by treated 100mm x 100mm posts set in concrete foundations. Trellis panels with smaller holes of say 5cm rather than the standard 10cm, give a certain Japanese/Zen-type style to a garden, especially when fixed to a wall or as stand-alone trellis screens.
A trellis has multiple uses. The obvious one is to allow you to grow beautiful climbing plants, but it also serves to hide or enhance parts of the garden. You can also use it to attach other planters or temporary lighting like string lights for a gathering.