In addition to contractions (see above), the apostrophe’s most common use is making a word possessive. If the word already ends in an s and it’s singular, you also add an ’s. If the word ends in an s and is plural, just add an apostrophe.
✅ Videobolt improved Sam’s video production.
✅ Videobolt improved Chris’s video production.
✅ Our users’ videos are better than the average online video.
❗ Avoid using “Videobolt’s”. Rewrite the sentence so that it’s just Videobolt.
Apostrophes can also be used to denote that you’ve dropped some letters from a word, usually for humor or emphasis. This is fine, but do it sparingly.