Calculating sov is going nowhere

share of voice is just your slice divided by the total for the same set, but you have to decide what you're counting first. for seo, take a fixed keyword list, estimate clicks per position for you and competitors, your share of the total. for ads, google ads impression share is already sov. for social, your mentions over all mentions in the category. nothing changed recently that i know of, people just use the term for all three.