Hello friends, I launched a website few months ago and started to build quality backlinks then I got indexed well on google for the best competing keywords I was on page 5 for the 2 keywords then suddenly my site has dropped from the first keyword and later on I jumped to page 4 for the second keyword and obtained PR1 then today my site has been dropped for the second keyword I checked my indexed pages and it's well not affected and tried to search for something else in my homepage and got my website in the search results so I think I'm not sandboxed but how may this happen can sandbox affects some keywords only? please anyone help me to understand this situation
You may have gotten a penalty for those keywords. This sometimes happens when too a high a percentage of your backlinks use the exact same link anchor text. There may be other things that cause a penalty just for a certain keyword too. A brand new website rarely has stable rankings though. You may just be getting results from different Google data centers sometimes. Just keep building links and keep adding more unique content to your website. In time you should get those rankings back.