How do you know if you get good search engine optimisation?
There are several different ways to work with SEO. Each site is unique and has different conditions.
What characterizes a good agency is that they work with all the pieces on your site. Below is a short summary of the different pieces.
Technically - to ensure that the page is indexed correctly and can be read by Google's spiders correctly. That the pages load fast.
Onpage - with content and UX. Relevant texts and images. That visitors get answers to what they are looking for within your area. Keyword optimized texts.
Offpage- Build the brand in different social channels. Find influencers. Drive traffic to the site. Find links with quality on your own domains. Create a mix of different types of backlinks.
Ask your agency to present a strategy for these different 3 pieces to work out and request a reconciliation every month about what's happening and how they plan to work next month. What can they do from their side and what can you do to strengthen from your side.
Many companies working with SEO create a quick positioning using primarily link building. It usually gives quick effect that you can present to you as a customer. But if you want to stand in the long run, you have to work on all three levels.
More that you need to ask your SEO Agency is, what happens to the backlinks that come under your cooperation. Are they left or removed if you terminate your cooperation.
Do you own your accounts yourself? Do you own ownership of your own domain in Analytics, Adwords, and Search Console?
Request to be added as the owner of these accounts with your company mail so you have full insight into different types of data.
A serious SEO agency always works with more than just backlinks.