What bug is this?

Bug identification! All insects, spiders, crustaceans, etc. welcome!

What kind of bug is this?

Welcome! This is a place to ask PRO techs and knowledgeable enthusiasts how to solve pest issues. When posting, clear closeup pics of the BACK of the insect are a must. PLEASE give your location or country if outside the US. Also, if you already know what pest you have, go to: r/Pest_Management. All the treatment links are there.