Everyone has heard of the cache – but what is its function? How can the cache have a positive effect on SEO?
What is a cache?
A cache is a temporary memory that is saved on the server, browser or PC. This type allows quick access to data that is usually stored for a short period of time, such as the login. This means that it does not have to be reloaded each time it is accessed.
How it works: Cache in the browser
The cache in the browser is one of the most important things, as this ensures that the website is retrieved quickly on a return visit. The content in the cache is not easily recognizable to the user, and the content is not permanently saved. With the cache, the browser has a kind of short-term memory that the computer can access quickly. Every browser, such as Google Chrome, Apple Safari or Firefox, has a cache.
How it works: Cache for search engines
Search engines such as Google and Bing also have a cache, which is used as a buffer for the SERPs. This fulfills various functions, as the search engine also searches this content in order to display the relevant information to the user. This works in fractions of a second.
What is the importance of the cache in SEO?
The cache has disadvantages for websites that are updated frequently. Caching would therefore ensure that users also receive older content in some cases. Accordingly, there is the meta tag “No-Cache”, which can be integrated into the website code to prevent this function. However, a website can also communicate when and how often changes are made to the website, and there are corresponding functions for this in the Google Search Console.
When should the cache be emptied?
Over time, the browser saves some content that may no longer be needed. This slows down the computer or smartphone, so the cache memory should be emptied regularly. This is also helpful to reduce traces on the internet, as trackers also read the cache.
