A regular Collection lets you choose which photographs you want to see together. A Smart Collection works differently. You describe the photographs using criteria such as ratings, keywords, location information, or camera metadata, and Lightroom Classic gathers the photographs that match.

The real advantage is that the group isn't static. As photographs enter the catalog or their metadata changes, they can automatically appear in or disappear from a Smart Collection. The rules keep working as the catalog changes.

Folders and Collections can both look like ways to organize photographs in Lightroom Classic, but they solve different problems. Folders describe where the original photographs physically live. Collections let you bring photographs together without changing that physical organization.

That becomes especially useful when a gallery, project, subject, or other body of work includes photographs stored in many different folders. Collections give you another way to see those photographs together while leaving the originals exactly where they belong.

A Lightroom folder structure doesn't need to account for every date, location, subject, or shoot with another level of folders. Organizing photographs into dated folders is especially common, but unless dates are how you naturally look for your photographs, that extra structure may not be helping you. Too much structure can make a photo library harder to understand rather than easier.

I keep all of my photographs beneath one top-level folder, then use a relatively shallow hierarchy underneath it. Different types of photography can follow different organizational logic. The important thing is that the structure matches how you naturally think about and look for your photographs.

A Lightroom folder structure doesn't need to account for every date, location, subject, or shoot with another level of folders. Organizing photographs into dated folders is especially common, but unless dates are how you naturally look for your photographs, that extra structure may not be helping you. Too much structure can make a photo library harder to understand rather than easier.

I keep all of my photographs beneath one top-level folder, then use a relatively shallow hierarchy underneath it. Different types of photography can follow different organizational logic. The important thing is that the structure matches how you naturally think about and look for your photographs.

For me, one catalog works best because I want a single place for all of my photography, both personal and professional. I can still organize those parts of my library differently without separating them into completely different catalogs.

Organizing a Lightroom catalog can quickly become an exercise in folders, keywords, ratings, and metadata. Before deciding how to use those tools, step back and ask a more important question: What do you eventually want to do with your photographs?

A useful workflow begins with those goals. Once you understand how you want to find, revisit, and share your photographs, you can build a Lightroom system that supports the way you actually think and work.