This is something that you can choose to have or not have on your website. There is no rule that says you must have reviews, and there are many websites that do not have them. However, there can be advantages to allowing customers to leave reviews on your website, assuming that the service or products you provide them are of a high standard.
The most obvious benefit is that it gives new visitors to your website some reassurance that you are a reputable business if they see several 5-star reviews, and comments which include lots of praise.
Bear in mind that as these reviews are likely to be in text form, Google’s spiders will crawl them. Reviews might include some of your keywords plus words which you might want rank for, like ‘best’, ‘quality’ when added to them.
Think what might happen if several of your reviews include the words ‘best kitchen fitter in Perth’. It’s no guarantee you will always show up at #1 if someone types in that phrase, but it can’t do you any harm.
One of the biggest mistakes made with regards to SEO is to assume that if something is currently working well, that it will continue to do so forever.
There are several reasons for this, not least of which is Google continually changing and updating their algorithms. Entire business models have ground to a halt overnight, never to be resurrected, due to Google deciding that something which previously helped a website rank well, was in fact a negative.
One area which always seems to be in flux is backlinking or internal linking, and there are countless theories, rumours, myths, and outright misinformation as to how and where backlinks should be acquired. This creates a problem for those who have already gone out, sought backlinks legitimately, and then linked to their website.
They now might be questioning whether they should keep those backlinks or go out and look for more. The problem is exacerbated as Google continues to move from a position of simply counting the number of backlinks a website has, to a model where the power and authority of those backlinks become increasingly important ranking factors.
Google has made it clear that the so-called E-A-T measure is what they are now looking at, so Expertise, Authority and Trustworthiness is what they want to find when crawling a website. This applies not only to the website being crawled, but they are also going to take E-A-T into account when looking at what websites its backlinks are coming from.