Virtually any effort made by websites' owners to conduct SEO for their sites is done by default to improve their rankings in SERPs generated on the Google search engine. Google is ingrained into the fabric of modern Internet culture to such an extent that it is the first search engine considered for use by the majority of people who regularly browse the Internet. This naturally means that webmasters are more familiar with the logic behind the algorithms Google and its website crawlers use to assign rankings to websites than with the internal mechanics of any of Google's closest competitors. Granted, the fact that far fewer viewers use "alternative" search engines like Yahoo heavily diminishes the value of optimizing websites for engines other than Google, but some websites consider doing this regardless to be an opportunity to realize an extra advantage in a highly competitive online market. One of the more widely known search engines aside from Google is Microsoft Bing, which carries a somewhat mixed reputation. Part of this blowback originates from those who critique search engines' ranking algorithms; they allege that Bing readily rewards websites that include a large quantity of keywords without necessarily sparing much effort toward optimizing the quality of how the keywords are incorporated into the content of the pages. Meanwhile, Bing is heavily criticized for ineffectually indexing websites that primarily rely on JavaScript syntax to present the brunt of their content. The only likely scenario in which a website's SEO efforts toward Bing can harm its ranking prospects in Google is one where the site prioritizes keyword quantity for Bing's sake over keyword quality for Google's sake. Otherwise, for a website that is already successful in Google, it should already be reasonably successful in Bing without the need for keyword stuffing if its structure is not heavily based in JavaScript. Another element that Bing distinctly pays attention to is whether the site's most important keywords are included in its meta tags. While Google's algorithms do not actually take keywords in this particular type of syntax into account, websites including them regardless is common practice. For more information click here https://www.reddit.com/r/SEO/comments/a154l2/bingsearchengineoptimizationstrategy/.