Hey there,
I agree with Patrick and definitely recommend that you check out the resources he provided.
You can optimize and create your landing page content however you see fit. If you want to optimize the content for more than one keyword, go ahead! The most important thing to remember is not to overstuff your content with keywords—but utilizing multiple keywords can definitely help this.
Before focusing on very specific keywords that you think are the most important for the industry, make sure that these are the keywords that people are actually searching. You should be writing content that attracts and helps users. You need to write for what they want to hear, not necessarily what you want to share.
Long tail keywords are becoming increasingly important because the way people perform searches is changing—especially with the undeniable increase of people performing searches on their mobile devices. People come to search engines for a number of reasons, and one of those reasons is to get answers. So unsurprisingly, search queries often take the form of a question. So don't forget about long tail keywords when creating content!