Use Facebook Insights to gain a better understanding of your Facebook fans. You can then target specific messages to meet the specific needs of subsets of your audience. For example, if you’re selling clothes and have written an article on the latest fashion trends for women, you can target your post to appear in the news feeds of women who have expressed an interest in clothes. Targeting options include Gender, Relationship Status, Location and Interests, etc. To target your Facebook post, simply click the targeting icon at the end of your post before you click Publish.
I think for agencies as far as how we appear in organic search ourselves, we are definitely going to need to leverage all 3 of the solutions you talk about and agencies who haven't branded their products/services are going to have to do that and are going to have to also employ branding strategies. In addition, we have to optimize for other search ares like you say in your point #2 and we must look at optimizing existing content for voice search and answers/featured snippets like you say in point #3.
Remember that users enter search words into search engines based on their interest. The matching keywords and phrases you choose for your campaigns help determine if your ad will display when users search online. But be aware, other advertisers may also be using the same keywords. That creates competition with your ad campaign. What can you do to win? One solution is keyword bidding.