When do you need to count words and characters?
Many platforms limit text length: Instagram captions allow up to 2,200 characters, posts on X are 280 characters for standard accounts, and an SMS is 160 characters per message. Essays, articles and job applications often set word limits too.
For SEO, an effective meta description usually runs about 150–160 characters so it isn’t cut off in search results. Counting first is faster than guessing.