Why my keyword rank suddenly drop to last page?

[Dynapro]

Hello Experts,
Two weeks before my keyword rank was within 100, now that is above 150. why did this happen?

[jayam]

Many factors can cause your rankings to drop in Google. Most frequently, we see drops because of changes that were made to the website, but they can also be caused by an algorithm update, technical issues, improvements competitors made, SERP lay-out changes or a Google penalty.

[jayammrg]

If you get good traffic no need to focus on alexa it will show results, ranking down.

[chandrao7]

Sometimes, the reason for a drop in site traffic is a case of unreliable data. One of the most common areas where this can happen is your site's tracking code. Because changes to your website code or even analytics plug-ins can create problems for the tracking code, issues in analytics reporting can arise.