Why we must Exercise caution in Gaining Links
Search Engine
When it comes to gaining website authority, there are numerous black hat techniques. It accounts for the use of fictitious backlinks.
Marketers now buy links, exchange links, for the sake of ranking on Google and other search engines. So Google and Bing have created guides against manipulated links, as this will help spurge out low-quality content.
Search Engines will avoid appropriating wrong ranks to a website with low-quality content. They can remove your website from their search result page if discovered to contain manipulated links
Changes in Content
Content on the website linking to your website can change with time. They can become more authoritative or become less relevant. If the website increases in relevance it will affect your content and if the reverse is the case it will affect your content. The worst-case if there is a change in content and it is not relevant to your content
As such, you must exercise caution when gaining links to your website.