The appositive is a really useful tool for inserting information about a noun. It doesn’t complicate the sentence except when it gets extended with modifying elements. One simply tucks identifying stuff inside enclosing commas, placing it most often right after the noun it’s describing. Anywhere a noun appears in your sentence, you could insert an appositive. And we use nouns all over the place. In my system, I identify appositives by putting them in parentheses, the same as with understood words and phrases. Some examples:
Sometimes, if you insert a really long appositive, as with a series, one or more of the items in the series using commas, you can no longer use commas to set off the series of appositives. If they come somewhere in the middle of the sentence, you can use paired dashes instead of commas, and then use semi-colons instead of commas on the interior. For example, "Several television series--The Mentalist, with the many Red John twists; The Good Wife, with all those sleazy lawyer shenanigans; NCIS, with way too many overlapping conflicts; and CSI, with yet another new head of the unit (Ted Danson)--seem to be staying afloat among a seaful of ships sinking in mediocrity." If they come at the end of the sentence, you can introduce them with a colon. For example, "Three important film stars came out in favor of the judicial proposal: Barbra Streisand, who supported Clinton; Marty Sheen, who supports any Democrat in office; and Clint Eastwood, who should know better than to support anyone Streisand and Sheen support."
I'll show you some more aspects of the appositive after you see the noun s-v-o. Can't wait, can you.