Scrapy provides various selectors for parsing web page content, including XPath selectors and CSS selectors. XPath is a language for finding information in XML documents and can also be used for HTML documents. Scrapy's XPath selectors support full XPath syntax and can locate elements very flexibly. CSS selectors use CSS selector syntax, which is more intuitive for developers familiar with CSS. Scrapy also provides regular expression selectors for extracting data matching patterns from text. In practice, developers can choose the appropriate selector based on their needs, or combine multiple selectors. For example, you can use XPath to locate an element and then use regular expressions to extract the text content from it. Scrapy's selectors also support chaining, allowing you to gradually narrow down the selection range. The use of selectors makes data extraction simple and efficient, and is an important tool in Scrapy spider development.