The role of bold and italics: Bold and italics have higher weight than ordinary text, and bolding helps to segment words.
If you put "search engine optimization" in bold, it will help search engines understand.
Usually when the font styles in an article are all in a unified format, if some parts use other font styles, the search engine will think that part is more important and will pay more attention to that part. In other words, the area to focus on crawling.
However, if some confusing words are highlighted in a website, it may be punished by search engines.
Notes:
Usually italics are used with caution on Chinese websites, because they are often not user-friendly and may cause visual fatigue or inability to read. Knowing that paragraph is likely to cause user loss, so in the process of doing Chinese SEO, avoid using italics as much as possible.
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