Content is the most important part of Search Engine Optimization.
Contents will allow Google to analyze your page and its purpose and decide if it is a relevant site for the searching person's needs. Google will only show sites that it thinks are interesting to their customer, as they want to yield good results. To say it bluntly: If Google does not like your contents, it will not show your page.
Here are a few things to keep in mind:
Texts are relevant!
Texts should be written in natural language and be comfortably readable. It should be explaining what the homepage is about and also make sense on all subpages. Use short sentences and try to keep your text to about 300 words.
Subpages should not be ignored and contain the same kind of text as the homepage. This is the best chance to make use of the keywords. Think hard about a few sentences, words or phrases that your visitors will use when they are looking for a site on Google. It is important that these are natural texts and not lists of keywords.
The associated Help article from the SupportCenter can be found here: https://support.jimdo.com/search-engine-optimization/how-search-engines-work/#cc-m-header-10091394583
Add Heading Elements to each page
Headings break up the text and help structure your content, but they also provide hints to Google. Put one (and only one!) Large Heading Element at the top of each page, ideally containing a relevant keyword that tells what the page is all about. Then use Medium and Small Heading Elements throughout the rest of your page to describe each section. Keep your headings short and relevant, and that will help Google out.
For more information, take a look [here](https://support.jimdo.com/basics/working-with-elements/heading/).
“Alternative Text” in Photo Elements is important
As Google can read text, but it can’t see what’s in images. So it’s a good idea to fill in the Alternative Text field on each of your Photo Elements with a short description of what’s in the image (ideally with a relevant keyword). That will help Google understand what the image is about and improve the chances that it will show up on a results page.
For more information, take a look [here](https://support.jimdo.com/basics/working-with-elements/photo/#cc-m-header-10065232283).
Updates are imperative
Google appreciates websites that are updated frequently with new content. Keep your website up to date and consider starting a blog to regularly add more new stuff. This will prompt Google to crawl your website more often, and it will also show that your site is active. This will help to ensure the page is high in the rankings and will be shown preferably. A site that did not have updates for some time will be gradually pushed out of the relevant results.