While what makes places feel welcoming is subjective, a few principles are almost universal. One of them is that people prefer orderly and clean spaces. So, whatever you’re going for with your backyard — whether it has grass, a garden, or a ton of décoration — just make sure it doesn’t look too visually busy and full of clutter at a glance. A neat and orderly backyard will always look more welcoming.
It can also be good to clear footpaths for visitors or make stone or concrete pathways. Few things make a place more inviting than having an actual footpath leading into that area. Finally, it’s also a good idea to invest in quality outdoor homewares for your backyard. There are plenty of comfortable and visually-appealing sofas and chairs being sold on this website and others like it, and having quality furniture laid out in the backyard will naturally make it more welcoming.