There are several reasons why your website may not be on the first page of Google or other search engines:

1. Lack of keyword optimization: One possible reason a website may not be on the first page of Google is a lack of keyword optimization. Keywords are the terms and phrases that people use to search for information online. In order to rank well in the search results, a website must include relevant keywords in its content and meta tags. If a website does not include relevant keywords, it may not rank well in the search results.
2. Low-quality content: Another reason a website may not be on the first page of Google is low-quality content. Google values high-quality, relevant, and useful content, and will rank websites with this type of content higher in the search results. If a website has low-quality, irrelevant, or spammy content, it is less likely to rank well in the search results.
3. Lack of backlinks: Backlinks are links from other websites that point to a particular website. Backlinks are an important factor in determining the ranking of a website in the search results. If a website has few or low-quality backlinks, it may not rank well in the search results.
4. Slow loading speed: The loading speed of a website can also impact its ranking in the search results. If a website takes too long to load, it may not rank well in the search results. This is because Google values websites that provide a good user experience, and slow loading speeds can be a negative user experience.
5. Poor website design: The design and usability of a website can also impact its ranking in the search results. If a website is difficult to navigate or has a poor user experience, it may not rank well in the search results. This is because Google values websites that are easy to use and provide a good user experience.
6. Competition: Another reason a website may not be on the first page of Google is competition. If there are many other websites that are optimized for the same keywords and have similar content, it can be difficult for a website to rank well in the search results. In this case, it may be necessary to optimize the website further or find new, less competitive keywords to target.
7. Lack of fresh content: Google values websites that are regularly updated with fresh, relevant content. If a website has not been updated in a while, or if it has very little content, it may not rank well in the search results.
8. Technical issues: There may also be technical issues with a website that are preventing it from ranking well in the search results. These issues could include problems with the website’s HTML code, problems with the website’s hosting server, or problems with the website’s redirects.

Overall, there are many reasons why a website may not be on the first page of Google. Some of the most common reasons include a lack of keyword optimization, low-quality content, a lack of backlinks, slow loading speed, poor website design, competition, a lack of fresh content, and technical issues. In order to rank well in the search results, it is important for businesses to optimize their website for search engines and provide high-quality, relevant, and useful content.