Link building is a rather new practice in the online business. What it actually does is that it creates links between similar sites, in order to raise their spots in the Google search results. However, since Google has improved its algorithms link building is not as simple as it used to be.
You now need SEO specialists to do it for you. You can buy link building from anywhere, no matter where your home is, but the link building from a London top agency is something you really need, and want.
Imagine just what a large database a London agency has, and imagine your site linked to all of that. A massive link between you, your site, and the outer world, ready to be explored. Not to mention the fact that you will get the perk of being placed higher in the Google hierarchy
However, the competition between the SEO agencies in London is so high, that if you are a good negotiator you can get a discount or even a half price for the link building services.
Don’t throw yourself at the feet of the first agency, but rather look for smaller companies that are usually cheaper as well. Link building from London should bring you a lot of benefits, but only if you pay attention.