URL capitalization does matter in SEO, but not in the way you might think. It's not as simple as changing a URL to uppercase and expecting it to improve your ranking. However, people often ignore the rule of capitalization when searching for terms that are not normally capitalized. Search engines like Google Adwords are not case-sensitive, so the keywords will match regardless of lowercase and uppercase letters.
Google understands keywords that match exactly, as well as those that are closely related or relevant to the search string. Content creators should be aware of how search engines can deal with small differences in their content. For example, if you use capitalized tags in the title and a user searches for the keyword with exact capital letters, the search results will be the same. It's best practice to use Title Case, or capitalize only the first letter of words, as it's easier to read when browsing search results.
Keep in mind that searches for “Apple” and “apple” yield almost the same results. Recent changes to Google algorithms have made it difficult to reproduce the same results on Google using capital letters or uncapitalized letters. If you use capital letters in your URLs and someone searches for the same title with the same capital letters, there is a good chance that your URL will be displayed. It seems that search engines in the UK may see different results when they search first in lower case and then in upper case.
This is because some search engines are case-sensitive, meaning that a search for “Entertainment” will return different results than a search for “entertainment”.The best course of action when it comes to capitalization and SEO is to follow the correct spelling, capitalization, and punctuation of words and phrases as set by the rules of the language in which you write. The degree of optimization of your site determines where it shows up when searching for relevant keywords on sites such as Google, Bing and Yahoo. In conclusion, URL capitalization does matter in SEO, but not directly. It's important to use Title Case when creating content and URLs, as this makes it easier for potential visitors to read when browsing search results. Additionally, some search engines are case-sensitive, so it's important to use correct spelling and punctuation when creating content.