A photograph can work beautifully in its original shape and fall apart when someone needs a narrow banner or vertical poster. A face disappears, the important detail sits under a headline or the crop removes the space that made the composition feel balanced. I prefer to consider those uses while the camera is still available.
That does not mean making every photograph loose and noncommittal. A strong finished composition and a useful alternative can exist together. The problem comes when one tightly framed image is expected to do every job.

Ask where the photograph will go
Get the intended placements before the shoot if possible. Ask for dimensions or example layouts, not just platform names: one platform may use several different image shapes. Find out whether text, a logo or interface elements will sit over the picture.
For an imagined campaign, the requirements might be a wide page header, a portrait-format print and a square announcement. Write those down separately. You can then decide which can share a photograph and which need a different composition.
Protect the important relationships
Identify what must remain in the frame for the picture to make sense. A person alone may crop differently from a person interacting with an object. Keeping the face but cutting away the object can change the meaning, even if the crop looks technically tidy.
I also look for visual breathing room around hands, heads and the edges of important objects. A crop that nearly includes something can feel more awkward than one that decisively excludes it. Check the actual layout rather than assuming an automatic centre crop will choose well.
Make alternatives on purpose
Once you have the main photograph, make a second version with more room around the subject. If the use calls for it, make a vertical frame as well. Turn the camera and reconsider the composition; simply rotating the existing arrangement may leave empty space in an unhelpful place.
Try placing the subject towards different sides when a headline needs space. An uncluttered background can help, but leave enough contrast for the text to remain readable. A pale headline over a pale sky will still need a design solution, however attractive the original photograph.
Test representative crops early
Use the intended aspect ratios to review a few candidate images before editing the full selection. Check whether the subject survives, whether the balance still works and whether enough pixels remain for the intended output. A promising thumbnail does not establish that a severe crop will hold up at a larger size.
If the image only works in one format, label that clearly rather than stretching it to fit. You may choose a different photograph for the other placement. Consistent subject matter and editing can make different compositions feel like part of the same set.
Keep the original and name the variants
Retain a full-resolution master and create separate exports for agreed uses. Name the variants so the recipient can distinguish a wide banner from a square crop without opening every file. Avoid a folder where several files differ only by “final” and an increasing number of suffixes.
Include a short note if a version must not be cropped further because it would lose essential content. Planning is useful, but a clear handover matters too. The goal is to give the next person options they understand, which starts with a brief that explains the intended use.