First of all, you have to know what are the most important issues to optimize your landing page. Without this, don't move ;)
Now, your destination is "Settings" bookmark.
1. Make sure your domain/subdomain contains targeted keyword or keywords in URL.
2. Title and page description in searching results.
This is an important information for visitors and Google crawlers.
Put additional information to encourage visitors to visit your landing page.
Add your targeted keywords to title and description.
The title tag should have less than 70 characters and description tag less than 155 characters.
Please remember that very often quantity does not mean quality.
When you add more keywords there it doesn't make your site position better.
3. All images have alt tags and SEO-friendly file names.
Blow the whistle on photos or graphics name which you add.
Try to create file names the same as what they look.
A perfect name should look like this: Photo_name_service(company).jpg not IMG_12345.jpeg.
You see title tag and alt description below:
TITLE: after hovering over the photo/graphics you will see this title,
ALT: content you will see when the photo/graphics cannot be loaded; it is also used by website readers for blind users.
Remember, that both files name and alt attributes should include target keywords.
Don't forget to optimize images, which you using on your landing pages.
They shouldn't have weight and size too large. Recommended upload image size is about 100 kB and 1920x1020 maximum resolution (about cover photos).
Recommended for you: the tool which you can be used to make photos size smaller, before uploading on server: https://tinypng.com/
4. Make sure your landing page is indexed by search engines.
Make sure the landing page is visible for Google and other search engines crawlers.
Of course, you can submit your landing page to indexing yourself.
Depends on a browser you can use links from below:
- Bing: http://www.bing.com/toolbox/submit-site-url
- Google: https://www.google.com/webmasters/tools/submit-url?pli=1
- Yandex: https://webmaster.yandex.com/site/tools/add-url/
5. H1 headers for each section.
Each section should contain unique H1 headers.
For better SEO optimization you shouldn't duplicate the same headings in the following sections.
If it possible, add keywords to your headings.
6. Page content.
Very important issue for you has put the keywords in the content.
The good solution for making your landing page more varied is word substitution.
Make sure that your content is not a random piece of words.
Useful tools are for example:
http://tools.seobook.com/general/keyword-density/ - it is a very nice tool, where you only have to paste landing page link to get very specific information included keywords location and use (for example H1, H2, P, etc.);
http://wordcounter360.com - a tool that you can use before page publishing.
It is to get an indication of how many times a keyword is affected.
Remember, to upgrade page content when you make some changes. You can complementary your page about new opinion or testimonials.
It is just a beginning of SEO optimization.
Following instruction contains only information about on-page SEO.
Next step is to make sure you get the dofollow and nofollow links to your landing page.